Invalid access to memory - Vcl::Comctrls::TTreeNode::GetTree

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Unzulässiger Zugriff auf einen Speicherbereich.

Stapelverfolgung:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00087A6F) ntdll.dll
(000740C1) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00040779) USER32.dll
(00036B65) USER32.dll
(0003549C) USER32.dll
(00034FBB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(000987BF) ntdll.dll
(00077E51) ntdll.dll.KiUserExceptionDispatcher
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00032451) USER32.dll
(000232A1) USER32.dll
(00021B60) USER32.dll
(000216AB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(000987BF) ntdll.dll
(00077E51) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00032451) USER32.dll
(000232A1) USER32.dll
(00021B60) USER32.dll
(000216AB) USER32.dll.DispatchMessageW
(00021C62)QIPCAP.dll

The problem happens rarely. I cannot reproduce it.

Every time I use Winscp, I get this error in the background.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.2

Error message:
Invalid access to memory.

Stack trace:
(0043AABF) Vcl::Comctrls::TTreeNode::GetTreeView
(000987BF) ntdll.dll
(00077E51) ntdll.dll.KiUserExceptionDispatcher
(0049337D) Customdriveview::_16448
(0049340C) Customdriveview::TCustomDriveView::IterateSubTree
(004A5CB2) Driveview::TDriveView::ValidateDirectoryEx
(0049309D) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFD33) Vcl::Extctrls::TTimer::Timer
(00226F88) System::Classes::_18201
(00032451) USER32.dll
(000232A1) USER32.dll
(00021B60) USER32.dll
(000216AB) USER32.dll.DispatchMessageW

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.

This happens sometimes when resuming Windows from sleep and connecting via Remote Desktop.

WinSCP 6.1.1

Error message:
Invalid access to memory.

Stack trace:
(00427B3B) Vcl::Comctrls::TTreeNode::GetTreeView
(000974CF) ntdll.dll
(00077751) ntdll.dll.KiUserExceptionDispatcher
(004802D9) Customdriveview::_16448
(004802D9) Customdriveview::_16448
(00480368) Customdriveview::TCustomDriveView::IterateSubTree
(00492ADE) Driveview::TDriveView::ValidateDirectoryEx
(0047FFF9) Customdriveview::TCustomDriveView::ValidateDirectory
(003CCDAF) Vcl::Extctrls::TTimer::Timer
(00214D98) System::Classes::_18201
(000313A1) USER32.dll
(000220B1) USER32.dll
(00020970) USER32.dll
(000204BB) USER32.dll.DispatchMessageW

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00087B9F) ntdll.dll
(00074121) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(000356EC) USER32.dll
(0003520B) USER32.dll.DispatchMessageW

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.

@cyndy.bell, @stuartb.2023 and @nikolai.muittari: Thanks for your reports.
I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
This happened in the background.
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00087B9F) ntdll.dll
(00074121) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(000356EC) USER32.dll
(0003520B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.2

Error message:
Invalid access to memory.

Stack trace:
(0043AABF) Vcl::Comctrls::TTreeNode::GetTreeView
(0009823F) ntdll.dll
(00077E51) ntdll.dll.KiUserExceptionDispatcher
(0049340C) Customdriveview::TCustomDriveView::IterateSubTree
(004A5CB2) Driveview::TDriveView::ValidateDirectoryEx
(0049309D) Customdriveview::TCustomDriveView::ValidateDirectory
(004A36F5) Driveview::TDriveView::Change
(0043F2F6) Vcl::Comctrls::TCustomTreeView::CNNotify
(00492BB5) Customdriveview::TCustomDriveView::CNNotify
(00409261) Vcl::Controls::TWinControl::WndProc
(0043F5B2) Vcl::Comctrls::TCustomTreeView::WndProc
(004093C7) Vcl::Controls::_17076
(00409261) Vcl::Controls::TWinControl::WndProc
(004088A8) Vcl::Controls::TWinControl::MainWndProc
(00226F88) System::Classes::_18201
(000320B1) USER32.dll
(00022EF1) USER32.dll
(00022975) USER32.dll
(0002C89D) USER32.dll
(00077E0B) ntdll.dll.KiUserCallbackDispatcher
(00039303) USER32.dll
(000219D1) USER32.dll.SendMessageW
(0009A186) COMCTL32.DLL
(00051FA8) COMCTL32.DLL
(00051E88) COMCTL32.DLL
(0004AB4B) COMCTL32.DLL
(000320B1) USER32.dll
(00022EF1) USER32.dll
(00022862) USER32.dll.CallWindowProcW
(00409372) Vcl::Controls::TWinControl::DefaultHandler
(00409261) Vcl::Controls::TWinControl::WndProc
(0043F5B2) Vcl::Comctrls::TCustomTreeView::WndProc
(00226F88) System::Classes::_18201
(000320B1) USER32.dll
(00022EF1) USER32.dll
(00022975) USER32.dll
(0002C89D) USER32.dll
(00077E0B) ntdll.dll.KiUserCallbackDispatcher
(00039303) USER32.dll
(000219D1) USER32.dll.SendMessageW
(001D4033) Winapi::Commctrl::TreeView_SelectItem
(00491B15) Customdriveview::TCustomDriveView::CreateWnd
(004082F2) Vcl::Controls::TWinControl::CreateHandle
(0040471D) Vcl::Controls::TControl::WndProc
(00409261) Vcl::Controls::TWinControl::WndProc
(0043F5B2) Vcl::Comctrls::TCustomTreeView::WndProc
(004084B2) Vcl::Controls::TWinControl::RecreateWnd
(00409261) Vcl::Controls::TWinControl::WndProc

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.2

Error message:
Invalid access to memory.

Stack trace:
(0043AABF) Vcl::Comctrls::TTreeNode::GetTreeView
(00087B9F) ntdll.dll
(00074121) ntdll.dll.KiUserExceptionDispatcher
(0049340C) Customdriveview::TCustomDriveView::IterateSubTree
(004A5CB2) Driveview::TDriveView::ValidateDirectoryEx
(0049309D) Customdriveview::TCustomDriveView::ValidateDirectory
(004A36F5) Driveview::TDriveView::Change
(0043F2F6) Vcl::Comctrls::TCustomTreeView::CNNotify
(00492BB5) Customdriveview::TCustomDriveView::CNNotify
(00409261) Vcl::Controls::TWinControl::WndProc
(0043F5B2) Vcl::Comctrls::TCustomTreeView::WndProc
(004093C7) Vcl::Controls::_17076
(00409261) Vcl::Controls::TWinControl::WndProc
(004088A8) Vcl::Controls::TWinControl::MainWndProc
(00226F88) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(000369B5) USER32.dll
(0003AEBD) USER32.dll
(000740DB) ntdll.dll.KiUserCallbackDispatcher
(000350B8) USER32.dll.SendMessageW
(00068881) COMCTL32.DLL
(000288A2) COMCTL32.DLL
(00028777) COMCTL32.DLL
(0003EC38) COMCTL32.DLL
(00040999) USER32.dll
(00036DB5) USER32.dll
(00036571) USER32.dll.GetSystemMetricsForDpi
(00034D96) USER32.dll.CallWindowProcW
(00409372) Vcl::Controls::TWinControl::DefaultHandler
(00409261) Vcl::Controls::TWinControl::WndProc
(0043F5B2) Vcl::Comctrls::TCustomTreeView::WndProc
(00226F88) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(000369B5) USER32.dll
(0003AEBD) USER32.dll
(000740DB) ntdll.dll.KiUserCallbackDispatcher
(000350B8) USER32.dll.SendMessageW
(001D4033) Winapi::Commctrl::TreeView_SelectItem
(00491B15) Customdriveview::TCustomDriveView::CreateWnd
(004082F2) Vcl::Controls::TWinControl::CreateHandle
(0040471D) Vcl::Controls::TControl::WndProc
(00409261) Vcl::Controls::TWinControl::WndProc
(0043F5B2) Vcl::Comctrls::TCustomTreeView::WndProc
(004084B2) Vcl::Controls::TWinControl::RecreateWnd
(00409261) Vcl::Controls::TWinControl::WndProc

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00087B9F) ntdll.dll
(00074121) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(000356EC) USER32.dll
(0003520B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.1.2

Error message:
Invalid access to memory.

Stack trace:
(004283EF) Vcl::Comctrls::TTreeNode::GetTreeView
(0009617F) ntdll.dll
(000753A1) ntdll.dll.KiUserExceptionDispatcher
(00480C1C) Customdriveview::TCustomDriveView::IterateSubTree
(00493392) Driveview::TDriveView::ValidateDirectoryEx
(004808AD) Customdriveview::TCustomDriveView::ValidateDirectory
(00490E89) Driveview::TDriveView::Change
(0042CC26) Vcl::Comctrls::TCustomTreeView::CNNotify
(004803C5) Customdriveview::TCustomDriveView::CNNotify
(003F6B91) Vcl::Controls::TWinControl::WndProc
(0042CEE2) Vcl::Comctrls::TCustomTreeView::WndProc
(003F6CF7) Vcl::Controls::_17076
(003F6B91) Vcl::Controls::TWinControl::WndProc
(003F61D8) Vcl::Controls::TWinControl::MainWndProc
(0021564C) System::Classes::_18201
(00046CF1) USER32.dll
(000273E5) USER32.dll
(00026E75) USER32.dll
(0002ECCD) USER32.dll
(0007535B) ntdll.dll.KiUserCallbackDispatcher
(0002614E) USER32.dll.SendMessageW
(0008CAE9) COMCTL32.DLL
(0005D80D) COMCTL32.DLL
(0005D6E4) COMCTL32.DLL
(00027E6A) COMCTL32.DLL
(00046CF1) USER32.dll
(000273E5) USER32.dll
(0002623A) USER32.dll.CallWindowProcW
(003F6CA2) Vcl::Controls::TWinControl::DefaultHandler
(003F6B91) Vcl::Controls::TWinControl::WndProc
(0042CEE2) Vcl::Comctrls::TCustomTreeView::WndProc
(0021564C) System::Classes::_18201
(00046CF1) USER32.dll
(000273E5) USER32.dll
(00026E75) USER32.dll
(0002ECCD) USER32.dll
(0007535B) ntdll.dll.KiUserCallbackDispatcher
(0002614E) USER32.dll.SendMessageW
(001CF5BB) Winapi::Commctrl::TreeView_SelectItem
(0047F325) Customdriveview::TCustomDriveView::CreateWnd
(003F5C22) Vcl::Controls::TWinControl::CreateHandle
(003F204D) Vcl::Controls::TControl::WndProc
(003F6B91) Vcl::Controls::TWinControl::WndProc
(0042CEE2) Vcl::Comctrls::TCustomTreeView::WndProc
(003F5DE2) Vcl::Controls::TWinControl::RecreateWnd
(003F6B91) Vcl::Controls::TWinControl::WndProc

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(0009891F) ntdll.dll
(00077E81) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(000324C1) USER32.dll
(00023311) USER32.dll
(00021BB0) USER32.dll
(000216FB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
メモリのアクセス違反

スタック トレース:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00087B9F) ntdll.dll
(00074121) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(004A3929) Driveview::TDriveView::Change
(0043F52A) Vcl::Comctrls::TCustomTreeView::CNNotify
(00492DE9) Customdriveview::TCustomDriveView::CNNotify
(00409495) Vcl::Controls::TWinControl::WndProc
(0043F7E6) Vcl::Comctrls::TCustomTreeView::WndProc
(004095FB) Vcl::Controls::_17076
(00409495) Vcl::Controls::TWinControl::WndProc
(00408ADC) Vcl::Controls::TWinControl::MainWndProc
(002271BC) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(000369B5) USER32.dll
(0003AEBD) USER32.dll
(000740DB) ntdll.dll.KiUserCallbackDispatcher
(000350B8) USER32.dll.SendMessageW
(00068881) COMCTL32.DLL
(000288A2) COMCTL32.DLL
(00028777) COMCTL32.DLL
(0003EC38) COMCTL32.DLL
(00040999) USER32.dll
(00036DB5) USER32.dll
(00036571) USER32.dll.GetSystemMetricsForDpi
(00034D96) USER32.dll.CallWindowProcW
(004095A6) Vcl::Controls::TWinControl::DefaultHandler
(00409495) Vcl::Controls::TWinControl::WndProc
(0043F7E6) Vcl::Comctrls::TCustomTreeView::WndProc
(002271BC) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(000369B5) USER32.dll
(0003AEBD) USER32.dll
(000740DB) ntdll.dll.KiUserCallbackDispatcher
(000350B8) USER32.dll.SendMessageW
(001D4267) Winapi::Commctrl::TreeView_SelectItem
(00491D49) Customdriveview::TCustomDriveView::CreateWnd
(00408526) Vcl::Controls::TWinControl::CreateHandle
(00404951) Vcl::Controls::TControl::WndProc
(00409495) Vcl::Controls::TWinControl::WndProc
(0043F7E6) Vcl::Comctrls::TCustomTreeView::WndProc
(004086E6) Vcl::Controls::TWinControl::RecreateWnd
(00409495) Vcl::Controls::TWinControl::WndProc

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00087B9F) ntdll.dll
(00074121) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(000356EC) USER32.dll
(0003520B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.1

Error message:
Invalid access to memory.

Stack trace:
(0043A297) Vcl::Comctrls::TTreeNode::GetTreeView
(000987BF) ntdll.dll
(00077E51) ntdll.dll.KiUserExceptionDispatcher
(00492BE4) Customdriveview::TCustomDriveView::IterateSubTree
(004A545E) Driveview::TDriveView::ValidateDirectoryEx
(00492875) Customdriveview::TCustomDriveView::ValidateDirectory
(003DF50B) Vcl::Extctrls::TTimer::Timer
(00226760) System::Classes::_18201
(00032451) USER32.dll
(000232A1) USER32.dll
(00021B60) USER32.dll
(000216AB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.2

Error message:
Ошибка доступа к памяти.

Трассировка стека:
(0043AABF) Vcl::Comctrls::TTreeNode::GetTreeView
(00087B9F) ntdll.dll
(00074121) ntdll.dll.KiUserExceptionDispatcher
(0049340C) Customdriveview::TCustomDriveView::IterateSubTree
(004A5CB2) Driveview::TDriveView::ValidateDirectoryEx
(0049309D) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFD33) Vcl::Extctrls::TTimer::Timer
(00226F88) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(000356EC) USER32.dll
(0003520B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

Program was open but idle for a couple of days.

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00087B9F) ntdll.dll
(00074121) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(000356EC) USER32.dll
(0003520B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

I had an ethernet point-to-point connection from laptop to raspberry pi. At the end of the workday I pulled the cable from my laptop without closing WinSCP, pressed Ctrl+L and closed the lid. This mornig I opened my laptop and this error message showed up.
In the background, I had a second connection open (Putty).

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(000987BF) ntdll.dll
(00077E51) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00032451) USER32.dll
(000232A1) USER32.dll
(00021B60) USER32.dll
(000216AB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(000324C1) USER32.dll
(00023311) USER32.dll
(00021BB0) USER32.dll
(000216FB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00087AEF) ntdll.dll
(00073FB1) ntdll.dll.KiUserExceptionDispatcher
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00040379) USER32.dll
(00037345) USER32.dll
(000350B5) USER32.dll
(00034E7B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00087A6F) ntdll.dll
(000740C1) ntdll.dll.KiUserExceptionDispatcher
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00040779) USER32.dll
(00036B65) USER32.dll
(0003549C) USER32.dll
(00034FBB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

WinSCP left open with an active sftp connection for a couple of hours (over night). next morning the error occured without any further user action :)

WinSCP 6.3.3

Error message:
Unzulässiger Zugriff auf einen Speicherbereich.

Stapelverfolgung:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(000959FF) ntdll.dll
(00075421) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00046931) USER32.dll
(00027045) USER32.dll
(00025B50) USER32.dll
(0002567B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Unzulässiger Zugriff auf einen Speicherbereich.

Stapelverfolgung:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(004A3929) Driveview::TDriveView::Change
(0043F52A) Vcl::Comctrls::TCustomTreeView::CNNotify
(00492DE9) Customdriveview::TCustomDriveView::CNNotify
(00409495) Vcl::Controls::TWinControl::WndProc
(0043F7E6) Vcl::Comctrls::TCustomTreeView::WndProc
(004095FB) Vcl::Controls::_17076
(00409495) Vcl::Controls::TWinControl::WndProc
(00408ADC) Vcl::Controls::TWinControl::MainWndProc
(002271BC) System::Classes::_18201
(000324C1) USER32.dll
(00023311) USER32.dll
(00022D75) USER32.dll
(0002CCAD) USER32.dll
(0007819B) ntdll.dll.KiUserCallbackDispatcher
(00039943) USER32.dll
(00021DD1) USER32.dll.SendMessageW
(0009A186) COMCTL32.DLL
(00051F58) COMCTL32.DLL
(00051E38) COMCTL32.DLL
(0004AB0B) COMCTL32.DLL
(000324C1) USER32.dll
(00023311) USER32.dll
(00022C62) USER32.dll.CallWindowProcW
(004095A6) Vcl::Controls::TWinControl::DefaultHandler
(00409495) Vcl::Controls::TWinControl::WndProc
(0043F7E6) Vcl::Comctrls::TCustomTreeView::WndProc
(002271BC) System::Classes::_18201
(000324C1) USER32.dll
(00023311) USER32.dll
(00022D75) USER32.dll
(0002CCAD) USER32.dll
(0007819B) ntdll.dll.KiUserCallbackDispatcher
(00039943) USER32.dll
(00021DD1) USER32.dll.SendMessageW
(001D4267) Winapi::Commctrl::TreeView_SelectItem
(00491D49) Customdriveview::TCustomDriveView::CreateWnd
(00408526) Vcl::Controls::TWinControl::CreateHandle
(00404951) Vcl::Controls::TControl::WndProc
(00409495) Vcl::Controls::TWinControl::WndProc
(0043F7E6) Vcl::Comctrls::TCustomTreeView::WndProc
(004086E6) Vcl::Controls::TWinControl::RecreateWnd
(00409495) Vcl::Controls::TWinControl::WndProc

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Accesso alla memoria non valido.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(000406E9) USER32.dll
(00036B35) USER32.dll
(0003546C) USER32.dll
(00034F8B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.1.2

Error message:
Invalid access to memory.

Stack trace:
(004283EF) Vcl::Comctrls::TTreeNode::GetTreeView
(0008225F) ntdll.dll
(0006FDBA) ntdll.dll.KiUserExceptionDispatcher
(00480C1C) Customdriveview::TCustomDriveView::IterateSubTree
(00493392) Driveview::TDriveView::ValidateDirectoryEx
(004808AD) Customdriveview::TCustomDriveView::ValidateDirectory
(003CD663) Vcl::Extctrls::TTimer::Timer
(0021564C) System::Classes::_18201
(0002C2D1) USER32.dll
(0000C305) USER32.dll
(0000BC4F) USER32.dll
(0000BA0B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(000324C1) USER32.dll
(00023311) USER32.dll
(00021BB0) USER32.dll
(000216FB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(000406E9) USER32.dll
(00036B35) USER32.dll
(0003546C) USER32.dll
(00034F8B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(0009634F) ntdll.dll
(000754E1) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00046CF1) USER32.dll
(00027255) USER32.dll
(00025D60) USER32.dll
(0002588B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.1.2

Error message:
Invalid access to memory.

Stack trace:
(004283EF) Vcl::Comctrls::TTreeNode::GetTreeView
(00087B9F) ntdll.dll
(00074121) ntdll.dll.KiUserExceptionDispatcher
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480C1C) Customdriveview::TCustomDriveView::IterateSubTree
(00493392) Driveview::TDriveView::ValidateDirectoryEx
(004808AD) Customdriveview::TCustomDriveView::ValidateDirectory
(003CD663) Vcl::Extctrls::TTimer::Timer
(0021564C) System::Classes::_18201
(00040999) USER32.dll
(00036DB5) USER32.dll
(000356EC) USER32.dll
(0003520B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.4

Error message:
Invalid access to memory.

Stack trace:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(00032671) USER32.dll
(000234C1) USER32.dll
(00021D80) USER32.dll
(000218CB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

-------------------------------------
It happened immediately after my Thinkpad X1 woke up from sleep mode.
-------------------------------------

WinSCP 6.3.4

Error message:
Unzulässiger Zugriff auf einen Speicherbereich.

Stapelverfolgung:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(00032671) USER32.dll
(000234C1) USER32.dll
(00021D80) USER32.dll
(000218CB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.4

Error message:
Accesso alla memoria non valido.

Stack trace:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(00492FBD) Customdriveview::_16448
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(000324C1) USER32.dll
(00023311) USER32.dll
(00021BB0) USER32.dll
(000216FB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(000406E9) USER32.dll
(00036B35) USER32.dll
(0003546C) USER32.dll
(00034F8B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.1.2

Error message:
Invalid access to memory.

Stack trace:
(004283EF) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480C1C) Customdriveview::TCustomDriveView::IterateSubTree
(00493392) Driveview::TDriveView::ValidateDirectoryEx
(004808AD) Customdriveview::TCustomDriveView::ValidateDirectory
(003CD663) Vcl::Extctrls::TTimer::Timer
(0021564C) System::Classes::_18201
(000406E9) USER32.dll
(00036B35) USER32.dll
(0003546C) USER32.dll
(00034F8B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3

Error message:
Invalid access to memory.

Stack trace:
(0043A27B) Vcl::Comctrls::TTreeNode::GetTreeView
(000959FF) ntdll.dll
(00075421) ntdll.dll.KiUserExceptionDispatcher
(00492BC8) Customdriveview::TCustomDriveView::IterateSubTree
(004A5442) Driveview::TDriveView::ValidateDirectoryEx
(00492859) Customdriveview::TCustomDriveView::ValidateDirectory
(003DF4EF) Vcl::Extctrls::TTimer::Timer
(00226744) System::Classes::_18201
(00046931) USER32.dll
(00027045) USER32.dll
(00025B50) USER32.dll
(0002567B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<rdp reconnection>

WinSCP 6.3.3

Error message:
Ошибка доступа к памяти.

Трассировка стека:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00087B9F) ntdll.dll
(00074121) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00040949) USER32.dll
(00036D65) USER32.dll
(0003569C) USER32.dll
(000351BB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.4

Error message:
Invalid access to memory.

Stack trace:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(00492FBD) Customdriveview::_16448
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(000406E9) USER32.dll
(00036B35) USER32.dll
(0003546C) USER32.dll
(00034F8B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Unzulässiger Zugriff auf einen Speicherbereich.

Stapelverfolgung:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(0009807F) ntdll.dll
(00076301) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00046C30) USER32.dll
(00026035) USER32.dll
(00024963) USER32.dll
(0002449B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.2

Error message:
Ошибка доступа к памяти.

Трассировка стека:
(0043AABF) Vcl::Comctrls::TTreeNode::GetTreeView
(00087A7F) ntdll.dll
(000740D1) ntdll.dll.KiUserExceptionDispatcher
(0049337D) Customdriveview::_16448
(0049337D) Customdriveview::_16448
(0049337D) Customdriveview::_16448
(0049340C) Customdriveview::TCustomDriveView::IterateSubTree
(004A5CB2) Driveview::TDriveView::ValidateDirectoryEx
(0049309D) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFD33) Vcl::Extctrls::TTimer::Timer
(00226F88) System::Classes::_18201
(000401A9) USER32.dll
(00037165) USER32.dll
(00034EC5) USER32.dll
(00034C8B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

Woke laptop from sleep, presumably WinSCP tried and failed to reconnect, frozen connection window was still present along with main window, both windows (and with them, the process) closed without needing task manager, surprisingly. Unrelated, good job with the crash handler, haven't seen one this smooth before!

WinSCP 6.1.2

Error message:
Invalid access to memory.

Stack trace:
(004283EF) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480C1C) Customdriveview::TCustomDriveView::IterateSubTree
(00493392) Driveview::TDriveView::ValidateDirectoryEx
(004808AD) Customdriveview::TCustomDriveView::ValidateDirectory
(003CD663) Vcl::Extctrls::TTimer::Timer
(0021564C) System::Classes::_18201
(000324C1) USER32.dll
(00023311) USER32.dll
(00021BB0) USER32.dll
(000216FB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)> the program was just idling in my system tray and this error message popped up.

<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.4

Error message:
Invalid access to memory.

Stack trace:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(00040B79) USER32.dll
(00036FC5) USER32.dll
(000358FC) USER32.dll
(0003541B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)> Idle in system tray, error happens. I do nothing out of the ordinary (in fact its not even active out of the system tray).
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.4

Error message:
Invalid access to memory.

Stack trace:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(00040B79) USER32.dll
(00036FC5) USER32.dll
(000358FC) USER32.dll
(0003541B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

Memory usage was going up > 80% then network issue from WinScp.
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.4

Error message:
Invalid access to memory.

Stack trace:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(000326D1) USER32.dll
(000234E1) USER32.dll
(00021DA0) USER32.dll
(000218EB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Ошибка доступа к памяти.

Трассировка стека:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(004935B1) Customdriveview::_16448
(004935B1) Customdriveview::_16448
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(000326D1) USER32.dll
(000234E1) USER32.dll
(00021DA0) USER32.dll
(000218EB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

I had an opened WinScp window since yesterday, but connections were not active (after some time they disconnect, also vpn connection gets lost)
Notebook was in sleep mode. Today i logged in, enabled connected to vpn and then I saw this error.

WinSCP 6.3.1

Error message:
Invalid access to memory.

Stack trace:
(0043A297) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(00492B55) Customdriveview::_16448
(00492BE4) Customdriveview::TCustomDriveView::IterateSubTree
(004A545E) Driveview::TDriveView::ValidateDirectoryEx
(00492875) Customdriveview::TCustomDriveView::ValidateDirectory
(003DF50B) Vcl::Extctrls::TTimer::Timer
(00226760) System::Classes::_18201
(000406E9) USER32.dll
(00036B35) USER32.dll
(0003546C) USER32.dll
(00034F8B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

Connect through rdp

WinSCP 6.3.4

Error message:
Ошибка доступа к памяти.

Трассировка стека:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(00040B79) USER32.dll
(00036FC5) USER32.dll
(000358FC) USER32.dll
(0003541B) USER32.dll.DispatchMessageW

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.1.2

Error message:
Invalid access to memory.

Stack trace:
(004283EF) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480C1C) Customdriveview::TCustomDriveView::IterateSubTree
(00493392) Driveview::TDriveView::ValidateDirectoryEx
(004808AD) Customdriveview::TCustomDriveView::ValidateDirectory
(003CD663) Vcl::Extctrls::TTimer::Timer
(0021564C) System::Classes::_18201
(00040B79) USER32.dll
(00036FC5) USER32.dll
(000358FC) USER32.dll
(0003541B) USER32.dll.DispatchMessageW
(0001FC9B)QIPCAP.dll

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

Windows 10
Accessing a Siemens IOT2050 device with credentials.
Starting a filesearch as seen on the screenshot.
Takes a long time, still running when leaving the laptop.
Awakening Windows from sleep.
Found this errormessage.



WinSCP 6.3.4

Error message:
Unzulässiger Zugriff auf einen Speicherbereich.

Stapelverfolgung:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(000407C9) USER32.dll
(00036F25) USER32.dll
(0003585C) USER32.dll
(0003537B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.1.2

Error message:
Unzulässiger Zugriff auf einen Speicherbereich.

Stapelverfolgung:
(004283EF) Vcl::Comctrls::TTreeNode::GetTreeView
(0009634F) ntdll.dll
(000754E1) ntdll.dll.KiUserExceptionDispatcher
(00480B8D) Customdriveview::_16448
(00480C1C) Customdriveview::TCustomDriveView::IterateSubTree
(00493392) Driveview::TDriveView::ValidateDirectoryEx
(004808AD) Customdriveview::TCustomDriveView::ValidateDirectory
(003CD663) Vcl::Extctrls::TTimer::Timer
(0021564C) System::Classes::_18201
(00046CF1) USER32.dll
(00027245) USER32.dll
(00025D40) USER32.dll
(0002586B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.4

Error message:
メモリのアクセス違反

スタック トレース:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(00032771) USER32.dll
(00023591) USER32.dll
(00021E50) USER32.dll
(0002199B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.4

Error message:
Invalid access to memory.

Stack trace:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(000326D1) USER32.dll
(000234E1) USER32.dll
(00021DA0) USER32.dll
(000218EB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Acceso a memoria no válido

Rastreo de la pila:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00097FAF) ntdll.dll
(00076221) ntdll.dll.KiUserExceptionDispatcher
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFF67) Vcl::Extctrls::TTimer::Timer
(002271BC) System::Classes::_18201
(00046CD0) USER32.dll
(00026095) USER32.dll
(000249C3) USER32.dll
(000244FB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.4

Error message:
Acesso inválido à memória

Rastreamento de pilha:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(000326D1) USER32.dll
(000234E1) USER32.dll
(00021DA0) USER32.dll
(000218EB) USER32.dll.DispatchMessageW

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.

@ana and @11: Thanks for your reports.
I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.4

Error message:
Acceso a memoria no válido

Rastreo de la pila:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(00040B79) USER32.dll
(00036FC5) USER32.dll
(000358FC) USER32.dll
(0003541B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.1.2

Error message:
Invalid access to memory.

Stack trace:
(004283EF) Vcl::Comctrls::TTreeNode::GetTreeView
(00087AFF) ntdll.dll
(00073FD1) ntdll.dll.KiUserExceptionDispatcher
(00480B8D) Customdriveview::_16448
(00480C1C) Customdriveview::TCustomDriveView::IterateSubTree
(00493392) Driveview::TDriveView::ValidateDirectoryEx
(004808AD) Customdriveview::TCustomDriveView::ValidateDirectory
(003CD663) Vcl::Extctrls::TTimer::Timer
(0021564C) System::Classes::_18201
(0003FE89) USER32.dll
(00036E55) USER32.dll
(00034BC5) USER32.dll
(0003498B) USER32.dll.DispatchMessageW

I know how to reproduce the problem or the problem happens frequently enough. I wish to be contacted by the WinSCP team to help resolving the problem.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.1.2

Error message:
无效的内存访问。

Stack trace:
(004283EF) Vcl::Comctrls::TTreeNode::GetTreeView
(00087A7F) ntdll.dll
(000740D1) ntdll.dll.KiUserExceptionDispatcher
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480C1C) Customdriveview::TCustomDriveView::IterateSubTree
(00493392) Driveview::TDriveView::ValidateDirectoryEx
(004808AD) Customdriveview::TCustomDriveView::ValidateDirectory
(003CD663) Vcl::Extctrls::TTimer::Timer
(0021564C) System::Classes::_18201
(00040209) USER32.dll
(000371C5) USER32.dll
(00034F25) USER32.dll
(00034CEB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

@mferguson: Thanks for your report.
I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.1.2

Error message:
Invalid access to memory.

Stack trace:
(004283EF) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(00480C1C) Customdriveview::TCustomDriveView::IterateSubTree
(00493392) Driveview::TDriveView::ValidateDirectoryEx
(004808AD) Customdriveview::TCustomDriveView::ValidateDirectory
(003CD663) Vcl::Extctrls::TTimer::Timer
(0021564C) System::Classes::_18201
(00032771) USER32.dll
(00023591) USER32.dll
(00021E50) USER32.dll
(0002199B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.3

Error message:
Invalid access to memory.

Stack trace:
(0043ACF3) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(00493640) Customdriveview::TCustomDriveView::IterateSubTree
(004A5EE6) Driveview::TDriveView::ValidateDirectoryEx
(004932D1) Customdriveview::TCustomDriveView::ValidateDirectory
(004A3929) Driveview::TDriveView::Change
(0043F52A) Vcl::Comctrls::TCustomTreeView::CNNotify
(00492DE9) Customdriveview::TCustomDriveView::CNNotify
(00409495) Vcl::Controls::TWinControl::WndProc
(0043F7E6) Vcl::Comctrls::TCustomTreeView::WndProc
(004095FB) Vcl::Controls::_17076
(00409495) Vcl::Controls::TWinControl::WndProc
(00408ADC) Vcl::Controls::TWinControl::MainWndProc
(002271BC) System::Classes::_18201
(00032771) USER32.dll
(00023591) USER32.dll
(00023015) USER32.dll
(0002CF5D) USER32.dll
(0007819B) ntdll.dll.KiUserCallbackDispatcher
(00038EE3) USER32.dll
(00022071) USER32.dll.SendMessageW
(00000578)bdhkm32.dll
(00016EED) bdhkm32.dll
(000124B4) bdhkm32.dll
(0009A186) COMCTL32.DLL
(00051F58) COMCTL32.DLL
(00051E38) COMCTL32.DLL
(0004AB0B) COMCTL32.DLL
(00032771) USER32.dll
(00023591) USER32.dll
(00022F02) USER32.dll.CallWindowProcW
(004095A6) Vcl::Controls::TWinControl::DefaultHandler
(00409495) Vcl::Controls::TWinControl::WndProc
(0043F7E6) Vcl::Comctrls::TCustomTreeView::WndProc
(002271BC) System::Classes::_18201
(00032771) USER32.dll
(00023591) USER32.dll
(00023015) USER32.dll
(0002CF5D) USER32.dll
(0007819B) ntdll.dll.KiUserCallbackDispatcher
(00038EE3) USER32.dll
(00022071) USER32.dll.SendMessageW
(00000578)bdhkm32.dll
(00016EED) bdhkm32.dll
(000124B4) bdhkm32.dll
(001D4267) Winapi::Commctrl::TreeView_SelectItem
(00491D49) Customdriveview::TCustomDriveView::CreateWnd
(00408526) Vcl::Controls::TWinControl::CreateHandle
(00404951) Vcl::Controls::TControl::WndProc
(00409495) Vcl::Controls::TWinControl::WndProc
(0043F7E6) Vcl::Comctrls::TCustomTreeView::WndProc
(004086E6) Vcl::Controls::TWinControl::RecreateWnd
(00409495) Vcl::Controls::TWinControl::WndProc

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.1.2

Error message:
Invalid access to memory.

Stack trace:
(004283EF) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480B8D) Customdriveview::_16448
(00480C1C) Customdriveview::TCustomDriveView::IterateSubTree
(00493392) Driveview::TDriveView::ValidateDirectoryEx
(004808AD) Customdriveview::TCustomDriveView::ValidateDirectory
(003CD663) Vcl::Extctrls::TTimer::Timer
(0021564C) System::Classes::_18201
(00040B79) USER32.dll
(00036FC5) USER32.dll
(000358FC) USER32.dll
(0003541B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
I am not sure what led to that error, but it might have something to do with notebook sleeping/hibernation. Yesterday, WinSCP was running and connected to one server. I then hibernated (or made to sleep - not sure how it works) the notebook. This morning I noticed the error window. I did not interact with WinSCP in any way.

I am running
Windows 11 Enterprise
Version 23H2
OS build 22631.4037
Experience Windows Feature Experience Pack 1000.22700.1027.0


<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.4

Error message:
Invalid access to memory.

Stack trace:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00098CCF) ntdll.dll
(000781E1) ntdll.dll.KiUserExceptionDispatcher
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(00492FBD) Customdriveview::_16448
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(00032771) USER32.dll
(00023591) USER32.dll
(00021E50) USER32.dll
(0002199B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.1.2

Error message:
Invalid access to memory.

Stack trace:
(004283EF) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(00480B8D) Customdriveview::_16448
(00480C1C) Customdriveview::TCustomDriveView::IterateSubTree
(00493392) Driveview::TDriveView::ValidateDirectoryEx
(004808AD) Customdriveview::TCustomDriveView::ValidateDirectory
(003CD663) Vcl::Extctrls::TTimer::Timer
(0021564C) System::Classes::_18201
(00040819) USER32.dll
(00036F65) USER32.dll
(0003589C) USER32.dll
(000353BB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 6.3.4

Error message:
Invalid access to memory.

Stack trace:
(0043A85B) Vcl::Comctrls::TTreeNode::GetTreeView
(00087FFF) ntdll.dll
(00074531) ntdll.dll.KiUserExceptionDispatcher
(00492FBD) Customdriveview::_16448
(0049304C) Customdriveview::TCustomDriveView::IterateSubTree
(004A58F2) Driveview::TDriveView::ValidateDirectoryEx
(00492CDD) Customdriveview::TCustomDriveView::ValidateDirectory
(003DFB03) Vcl::Extctrls::TTimer::Timer
(00226F2C) System::Classes::_18201
(00040819) USER32.dll
(00036F65) USER32.dll
(0003589C) USER32.dll
(000353BB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

@11: See Issue 2286 – Failure when system theme is changed at the same time directory change is detected