Invalid access to memory

<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 5.6.3

Error message:
Invalid access to memory.

Stack trace:
[01878D93] TFTPFileSystem::HandleCapabilities
[019F6B82] C4727_3
[019F8BEA] ____ExceptionHandler
[019F5B64] __ExceptionHandler
[7798F08E] ntdll.dll
[7798EEF6] ntdll.dll.KiUserExceptionDispatcher
[01873A28] TFTPFileSystem::ProcessMessage
[01873A45] TFTPFileSystem::DiscardMessages
[0191F9EB] TTerminal::~TTerminal
[012953C5] TManagedTerminal::~TManagedTerminal
[012966D8] TTerminalManager::FreeTerminal
[01295D6F] TTerminalManager::FreeActiveTerminal
[01296482] TTerminalManager::ReconnectActiveTerminal
[012A35C2] ShowExtendedExceptionEx
[0123B580] TCustomScpExplorerForm::ShowExtendedException
[01297BB9] TTerminalManager::TerminalShowExtendedException
[01923800] TTerminal::ShowExtendedException
[0155F9BC] System::Classes::_18201
[77327831] USER32.DLL.CallNextHookEx
[77327A95] USER32.DLL
[77329889] USER32.DLL
[773298EC] USER32.DLL.DispatchMessageW

[019F71ED] C4727_3
[019F87C7] _ReThrowException
[012964A7] TTerminalManager::ReconnectActiveTerminal
[012A35C2] ShowExtendedExceptionEx
[0123B580] TCustomScpExplorerForm::ShowExtendedException
[01297BB9] TTerminalManager::TerminalShowExtendedException
[01923800] TTerminal::ShowExtendedException
[0155F9BC] System::Classes::_18201
[77327831] USER32.DLL.CallNextHookEx
[77327A95] USER32.DLL
[77329889] USER32.DLL
[773298EC] USER32.DLL.DispatchMessageW

Thanks for your report.
I have sent you an email with a debug version of WinSCP to 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 5.7.1

Error message:
Invalid access to memory.

Stack trace:
[018FDFDF] TFTPFileSystem::HandleCapabilities
[01A81962] C4799_0
[01A839CA] ____ExceptionHandler
[01A80944] __ExceptionHandler
[777965C6] ntdll.dll.RtlRaiseStatus
[77796452] ntdll.dll.KiUserExceptionDispatcher
[018F8638] TFTPFileSystem::ProcessMessage
[018F8655] TFTPFileSystem::DiscardMessages
[019A950F] TTerminal::~TTerminal
[01315F16] TManagedTerminal::~TManagedTerminal
[0131725C] TTerminalManager::FreeTerminal
[013168BF] TTerminalManager::FreeActiveTerminal
[01316CE4] TTerminalManager::ConnectActiveTerminal
[013175BF] TTerminalManager::DoSetActiveTerminal
[01317312] TTerminalManager::SetActiveTerminal
[012A3462] wWinMain
[01A7FAB9] __wstartup
[777AB3F3] ntdll.dll
[777AB3C3] ntdll.dll

Have VMware player running and a VPN.

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

I was accessing the remote server with WinSCP and initiated the OpenVPN GUI at the same time.

WinSCP 5.9.2

Error message:
Invalid access to memory.

Stack trace:
(006ACE97) TFTPFileSystem::HandleCapabilities
(0008137F) ntdll.dll
(0006EF1A) ntdll.dll.KiUserExceptionDispatcher
(006A6D9C) TFTPFileSystem::ProcessMessage
(006A6DB9) TFTPFileSystem::DiscardMessages
(0076C22F) TTerminal::~TTerminal
(0008A4C6) TManagedTerminal::~TManagedTerminal
(0008B860) TTerminalManager::FreeTerminal
(0008AF2F) TTerminalManager::FreeActiveTerminal
(0008B2E8) TTerminalManager::ConnectActiveTerminal
(0008BB99) TTerminalManager::DoSetActiveTerminal
(0008B8F6) TTerminalManager::SetActiveTerminal
(0001B7FB) TCustomScpExplorerForm::NeedSession
(00022AF8) TCustomScpExplorerForm::CMShowingChanged
(00022A14) TCustomScpExplorerForm::Dispatch
(0024EC29) Vcl::Controls::TWinControl::WndProc
(002090D8) Vcl::Forms::TCustomForm::WndProc
(008093C5) Vclcommon::C2754_0
(00249D20) Vcl::Controls::TControl::Perform
(0024E019) Vcl::Controls::TWinControl::UpdateShowing
(0024E128) Vcl::Controls::TWinControl::UpdateControlState
(00250CCE) Vcl::Controls::TWinControl::CMVisibleChanged
(0024EC29) Vcl::Controls::TWinControl::WndProc
(002090D8) Vcl::Forms::TCustomForm::WndProc
(008094EC) Vclcommon::C2754_0
(00249D20) Vcl::Controls::TControl::Perform
(002486AE) Vcl::Controls::TControl::SetVisible
(000D764B) Execute
(000024A8) wWinMain
(0086187D) C4941_0
(0005F607) ntdll.dll
(0005F5CF) ntdll.dll

(006ACE97) TFTPFileSystem::HandleCapabilities
(00863846) C5073_3
(0

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 5.9.3

Error message:
Invalid access to memory.

Stack trace:
(006AED4F) TFTPFileSystem::HandleCapabilities
(00866422) C5073_3
(0086848A) ____ExceptionHandler
(00865244) __ExceptionHandler
(00081D3F) ntdll.dll
(0006F8EA) ntdll.dll.KiUserExceptionDispatcher
(006A8C54) TFTPFileSystem::ProcessMessage
(006A8C71) TFTPFileSystem::DiscardMessages
(0076E6F3) TTerminal::~TTerminal
(0008A65E) TManagedTerminal::~TManagedTerminal
(0008BAB4) TTerminalManager::FreeTerminal
(0008B183) TTerminalManager::FreeActiveTerminal
(0008B85E) TTerminalManager::ReconnectActiveTerminal
(00099A2B) ShowExtendedExceptionEx
(0001CD5C) TCustomScpExplorerForm::ShowExtendedException
(0008CEA1) TTerminalManager::TerminalShowExtendedException
(00772B78) TTerminal::ShowExtendedException
(0021306E) Vcl::Forms::TApplication::HandleException
(00373100) System::Classes::_18201
(0002C2B1) USER32.dll
(0000D885) USER32.dll
(0000D1DF) USER32.dll
(0000CF9B) USER32.dll.DispatchMessageW

(00866A8D) C5073_3
(00868067) _ReThrowException
(0008B883) TTerminalManager::ReconnectActiveTerminal
(00099A2B) ShowExtendedExceptionEx
(0001CD5C) TCustomScpExplorerForm::ShowExtendedException
(0008CEA1) TTerminalManager::TerminalShowExtendedException
(00772B78) TTerminal::ShowExtendedException
(0021306E) Vcl::Forms::TApplication::HandleException
(00373100) System::Classes::_18201
(0002C2B1) USER32.dll
(0000D885) USER32.dll
(0000D1DF) USER32.dll
(0000CF9B) 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 5.9.6

Error message:
Invalid access to memory.

Stack trace:
(006B0C03) TFTPFileSystem::HandleCapabilities
(000851CF) ntdll.dll
(00073161) ntdll.dll.KiUserExceptionDispatcher
(006AAB08) TFTPFileSystem::ProcessMessage
(006AAB25) TFTPFileSystem::DiscardMessages
(007705D3) TTerminal::~TTerminal
(0008AA26) TManagedTerminal::~TManagedTerminal
(0008BE7C) TTerminalManager::FreeTerminal
(0008B54B) TTerminalManager::FreeActiveTerminal
(0008B904) TTerminalManager::ConnectActiveTerminal
(0008C1B5) TTerminalManager::DoSetActiveTerminal
(0008BF12) TTerminalManager::SetActiveTerminal
(0001BA3B) TCustomScpExplorerForm::NeedSession
(00022E38) TCustomScpExplorerForm::CMShowingChanged
(00022CE7) TCustomScpExplorerForm::Dispatch
(0024F5A1) Vcl::Controls::TWinControl::WndProc
(00209A50) Vcl::Forms::TCustomForm::WndProc
(0080DD85) Vclcommon::C2758_0
(0024A698) Vcl::Controls::TControl::Perform
(0024E991) Vcl::Controls::TWinControl::UpdateShowing
(0024EAA0) Vcl::Controls::TWinControl::UpdateControlState
(00251646) Vcl::Controls::TWinControl::CMVisibleChanged
(0024F5A1) Vcl::Controls::TWinControl::WndProc
(00209A50) Vcl::Forms::TCustomForm::WndProc
(0080DEAC) Vclcommon::C2758_0
(0024A698) Vcl::Controls::TControl::Perform
(00249026) Vcl::Controls::TControl::SetVisible
(000D7FC3) Execute
(000024A8) wWinMain
(008669E1) __wstartup
(0006482B) ntdll.dll.RtlGetAppContainerNamedObjectPath
(000647F8) ntdll.dll.RtlGetAppContainerNamedObjectPath

(006B0C03) TFTPFil

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 5.11.2

Error message:
Acesso inválido à memória

Rastreamento de pilha:
(006C8EE7) TFTPFileSystem::HandleCapabilities
(0089C9C2) C5067_3
(0089EA2A) ____ExceptionHandler
(0089B7E4) __ExceptionHandler
(0003EF0E) ntdll.dll.ZwWow64CallFunction64
(0003F68A) ntdll.dll.KiUserExceptionDispatcher
(006C2D1C) TFTPFileSystem::ProcessMessage
(006C2D39) TFTPFileSystem::DiscardMessages
(00794DAF) TTerminal::~TTerminal
(000924EA) TManagedTerminal::~TManagedTerminal
(00093A50) TTerminalManager::FreeTerminal
(000930BF) TTerminalManager::FreeActiveTerminal
(000934D8) TTerminalManager::ConnectActiveTerminal
(00093D5C) TTerminalManager::DoSetActiveTerminal
(00093AE6) TTerminalManager::SetActiveTerminal
(0001BF79) TCustomScpExplorerForm::NeedSession
(000233C8) TCustomScpExplorerForm::CMShowingChanged
(00023232) TCustomScpExplorerForm::Dispatch
(00257C85) Vcl::Controls::TWinControl::WndProc
(0021214C) Vcl::Forms::TCustomForm::WndProc
(0083BA40) Vclcommon::C2751_0

(006C8EE7) TFTPFileSystem::HandleCapabilities
(0003EF0E) ntdll.dll.ZwWow64CallFunction64
(0003F68A) ntdll.dll.KiUserExceptionDispatcher
(006C2D1C) TFTPFileSystem::ProcessMessage
(006C2D39) TFTPFileSystem::DiscardMessages
(00794DAF) TTerminal::~TTerminal
(000924EA) TManagedTerminal::~TManagedTerminal
(00093A50) TTerminalManager::FreeTerminal
(000930BF) TTerminalManager::FreeActiveTerminal
(000934D8) TTerminalManager::ConnectActiveTerminal
(00093D5C) TTerminalManager::DoSetActiveTerminal
(00093AE6) TTerminalManager::SetActiveTerminal

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 5.11.2

Error message:
Invalid access to memory.

Stack trace:
(006C8EE7) TFTPFileSystem::HandleCapabilities
(0089C9C2) C5067_3
(0089EA2A) ____ExceptionHandler
(0089B7E4) __ExceptionHandler
(0005A60A) ntdll.dll
(0000F12E) ntdll.dll.KiUserExceptionDispatcher
(006C2D1C) TFTPFileSystem::ProcessMessage
(006C2D39) TFTPFileSystem::DiscardMessages
(00794DAF) TTerminal::~TTerminal
(000924EA) TManagedTerminal::~TManagedTerminal
(00093A50) TTerminalManager::FreeTerminal
(000930BF) TTerminalManager::FreeActiveTerminal
(000934D8) TTerminalManager::ConnectActiveTerminal
(00093D5C) TTerminalManager::DoSetActiveTerminal
(00093AE6) TTerminalManager::SetActiveTerminal
(0001BF79) TCustomScpExplorerForm::NeedSession
(000233C8) TCustomScpExplorerForm::CMShowingChanged
(00023232) TCustomScpExplorerForm::Dispatch
(00257C85) Vcl::Controls::TWinControl::WndProc
(0021214C) Vcl::Forms::TCustomForm::WndProc
(0083BA40) Vclcommon::C2751_0

(006C8EE7) TFTPFileSystem::HandleCapabilities
(0005A60A) ntdll.dll
(0000F12E) ntdll.dll.KiUserExceptionDispatcher
(006C2D1C) TFTPFileSystem::ProcessMessage
(006C2D39) TFTPFileSystem::DiscardMessages
(00794DAF) TTerminal::~TTerminal
(000924EA) TManagedTerminal::~TManagedTerminal
(00093A50) TTerminalManager::FreeTerminal
(000930BF) TTerminalManager::FreeActiveTerminal
(000934D8) TTerminalManager::ConnectActiveTerminal
(00093D5C) TTerminalManager::DoSetActiveTerminal
(00093AE6) TTerminalManager::SetActiveTerminal
(0001BF79) TCustomScpExplorerForm::NeedSession
(

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 5.13.3

Error message:
Naruszenie ochrony pamęci.

Stack trace:
(006D4043) TFTPFileSystem::HandleCapabilities
(008BCA5A) C5104_0
(008BEAC2) ____ExceptionHandler
(008BB87C) __ExceptionHandler
(00085B2F) ntdll.dll
(00073A61) ntdll.dll.KiUserExceptionDispatcher
(006CE2C8) TFTPFileSystem::ProcessMessage
(006CE2E5) TFTPFileSystem::DiscardMessages
(007B377F) TTerminal::~TTerminal
(0009485E) TManagedTerminal::~TManagedTerminal
(00095E78) TTerminalManager::FreeTerminal
(00095433) TTerminalManager::FreeActiveTerminal
(00095900) TTerminalManager::ConnectActiveTerminal
(00096184) TTerminalManager::DoSetActiveTerminal
(00095F0E) TTerminalManager::SetActiveTerminal
(0001C301) TCustomScpExplorerForm::NeedSession
(0001C2A6) TCustomScpExplorerForm::LastTerminalClosed
(00095F0E) TTerminalManager::SetActiveTerminal
(00095433) TTerminalManager::FreeActiveTerminal
(00095900) TTerminalManager::ConnectActiveTerminal
(00096184) TTerminalManager::DoSetActiveTerminal
(00095F0E) TTerminalManager::SetActiveTerminal
(0001C301) TCustomScpExplorerForm::NeedSession
(0001C2A6) TCustomScpExplorerForm::LastTerminalClosed
(00095F0E) TTerminalManager::SetActiveTerminal
(00095433) TTerminalManager::FreeActiveTerminal
(00095900) TTerminalManager::ConnectActiveTerminal
(00096184) TTerminalManager::DoSetActiveTerminal
(00095F0E) TTerminalManager::SetActiveTerminal
(0001C301) TCustomScpExplorerForm::NeedSession
(0001C2A6) TCustomScpExplorerForm::LastTerminalClosed
(00095F0E) TTerminalManager::SetActiveTerminal
(00095433) TTerminalManager::F

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 5.13.4

Error message:
Invalid access to memory.

Stack trace:
(006D514B) TFTPFileSystem::HandleCapabilities
(008BDC8E) C5104_3
(008BFCF6) ____ExceptionHandler
(008BCAB0) __ExceptionHandler
(0007DAFF) ntdll.dll
(0006B711) ntdll.dll.KiUserExceptionDispatcher
(006CF3D0) TFTPFileSystem::ProcessMessage
(006CF3ED) TFTPFileSystem::DiscardMessages
(007B4913) TTerminal::~TTerminal
(000950CA) TManagedTerminal::~TManagedTerminal
(000966C0) TTerminalManager::FreeTerminal
(00095C9F) TTerminalManager::FreeActiveTerminal
(00096148) TTerminalManager::ConnectActiveTerminal
(000969CC) TTerminalManager::DoSetActiveTerminal
(00096756) TTerminalManager::SetActiveTerminal
(00095C9F) TTerminalManager::FreeActiveTerminal
(00096148) TTerminalManager::ConnectActiveTerminal
(000969CC) TTerminalManager::DoSetActiveTerminal
(00096756) TTerminalManager::SetActiveTerminal
(0001C301) TCustomScpExplorerForm::NeedSession
(00023E60) TCustomScpExplorerForm::CMShowingChanged
(00023CCA) TCustomScpExplorerForm::Dispatch
(0025B9D5) Vcl::Controls::TWinControl::WndProc
(00215E9C) Vcl::Forms::TCustomForm::WndProc
(0085C048) Vclcommon::C2788_0

(006D514B) TFTPFileSystem::HandleCapabilities
(0007DAFF) ntdll.dll
(0006B711) ntdll.dll.KiUserExceptionDispatcher
(006CF3D0) TFTPFileSystem::ProcessMessage
(006CF3ED) TFTPFileSystem::DiscardMessages
(007B4913) TTerminal::~TTerminal
(000950CA) TManagedTerminal::~TManagedTerminal
(000966C0) TTerminalManager::FreeTerminal
(00095C9F) TTerminalManager::FreeActiveTerminal
(00096148) TTerminalManager::ConnectActiveTerminal
(000969CC) TTerminalManager::DoSetActiveTerminal
(00096756) TTerminalManager::SetActiveTerminal
(00095C9F) TTerminalManager::FreeActiveTerminal
(00096148) TTerminalManager::ConnectActiveTerminal
(000969CC) TTerminalManager::DoSetActiveTerminal
(00096756) TTerminalManager::SetActiveTerminal
(0001C301) TCustomScpExplorerForm::NeedSession
(00023E60) TCustomScpExplorerForm::CMShowingChanged
(00023CCA) TCustomScpExplorerForm::Dispatch
(0025B9D5) Vcl::Controls::TWinControl::WndProc
(00215E9C) Vcl::Forms::TCustomForm::WndProc
(0085C048) Vclcommon::C2788_0

(006D514B) TFTPFileSystem::HandleCapabilities
(008BDC8E) C5104_3
(008BFCF6) ____ExceptionHandler
(008BCAB0) __ExceptionHandler
(0007DAFF) ntdll.dll
(0006B711) ntdll.dll.KiUserExceptionDispatcher
(006CF3D0) TFTPFileSystem::ProcessMessage
(006CF3ED) TFTPFileSystem::DiscardMessages
(007B4913) TTerminal::~TTerminal
(000950CA) TManagedTerminal::~TManagedTerminal
(000966C0) TTerminalManager::FreeTerminal
(00095C9F) TTerminalManager::FreeActiveTerminal
(00096148) TTerminalManager::ConnectActiveTerminal
(000969CC) TTerminalManager::DoSetActiveTerminal
(00096756) TTerminalManager::SetActiveTerminal
(00095C9F) TTerminalManager::FreeActiveTerminal
(00096148) TTerminalManager::ConnectActiveTerminal
(000969CC) TTerminalManager::DoSetActiveTerminal
(00096756) TTerminalManager::SetActiveTerminal
(0001C301) TCustomScpExplorerForm::NeedSession
(00023E60) TCustomScpExplorerForm::CMShowingChanged
(00023CCA) TCustomScpExplorerForm::Dispatch
(0025B9D5) Vcl::Controls::TWinControl::WndProc
(00215E9C) Vcl::Forms::TCustomForm::WndProc
(0085C048) Vclcommon::C2788_0

The problem happens rarely. I cannot reproduce it.

I tried opening a connection to an SFTP server.

WinSCP 5.13.7

Error message:
Zugriffsverletzung - ungültiger Zugriff auf den Speicher.

Stack trace:
(006D62B7) TFTPFileSystem::HandleCapabilities
(008BF00E) C5105_0
(008C1076) ____ExceptionHandler
(008BDE30) __ExceptionHandler
(00087D6F) ntdll.dll
(00073211) ntdll.dll.KiUserExceptionDispatcher
(006D053C) TFTPFileSystem::ProcessMessage
(006D0559) TFTPFileSystem::DiscardMessages
(007B5A83) TTerminal::~TTerminal
(000952C6) TManagedTerminal::~TManagedTerminal
(000968D4) TTerminalManager::FreeTerminal
(00095E9B) TTerminalManager::FreeActiveTerminal
(0009635C) TTerminalManager::ConnectActiveTerminal
(00096BE0) TTerminalManager::DoSetActiveTerminal
(0009696A) TTerminalManager::SetActiveTerminal
(00095E9B) TTerminalManager::FreeActiveTerminal
(0009635C) TTerminalManager::ConnectActiveTerminal
(00096BE0) TTerminalManager::DoSetActiveTerminal
(0009696A) TTerminalManager::SetActiveTerminal
(00095E9B) TTerminalManager::FreeActiveTerminal
(0009635C) TTerminalManager::ConnectActiveTerminal
(00096BE0) TTerminalManager::DoSetActiveTerminal
(0009696A) TTerminalManager::SetActiveTerminal
(0001C3C9) TCustomScpExplorerForm::NeedSession
(00023F5C) TCustomScpExplorerForm::CMShowingChanged
(00023DC6) TCustomScpExplorerForm::Dispatch
(0025BD51) Vcl::Controls::TWinControl::WndProc
(00216218) Vcl::Forms::TCustomForm::WndProc
(0085D3DC) Vclcommon::C2790_0

(006D62B7) TFTPFileSystem::HandleCapabilities
(00087D6F) ntdll.dll
(00073211) ntdll.dll.KiUserExceptionDispatcher
(006D053C) TFTPFileSystem::ProcessMessage
(006D0559) TFTPFileSystem::DiscardMessages
(007B5A83) TTerminal::~TTerminal
(000952C6) TManagedTerminal::~TManagedTerminal
(000968D4) TTerminalManager::FreeTerminal
(00095E9B) TTerminalManager::FreeActiveTerminal
(0009635C) TTerminalManager::ConnectActiveTerminal
(00096BE0) TTerminalManager::DoSetActiveTerminal
(0009696A) TTerminalManager::SetActiveTerminal
(00095E9B) TTerminalManager::FreeActiveTerminal
(0009635C) TTerminalManager::ConnectActiveTerminal
(00096BE0) TTerminalManager::DoSetActiveTerminal
(0009696A) TTerminalManager::SetActiveTerminal
(00095E9B) TTerminalManager::FreeActiveTerminal
(0009635C) TTerminalManager::ConnectActiveTerminal
(00096BE0) TTerminalManager::DoSetActiveTerminal
(0009696A) TTerminalManager::SetActiveTerminal
(0001C3C9) TCustomScpExplorerForm::NeedSession
(00023F5C) TCustomScpExplorerForm::CMShowingChanged
(00023DC6) TCustomScpExplorerForm::Dispatch
(0025BD51) Vcl::Controls::TWinControl::WndProc
(00216218) Vcl::Forms::TCustomForm::WndProc
(0085D3DC) Vclcommon::C2790_0

(006D62B7) TFTPFileSystem::HandleCapabilities
(008BF00E) C5105_0
(008C1076) ____ExceptionHandler
(008BDE30) __ExceptionHandler
(00087D6F) ntdll.dll
(00073211) ntdll.dll.KiUserExceptionDispatcher
(006D053C) TFTPFileSystem::ProcessMessage
(006D0559) TFTPFileSystem::DiscardMessages
(007B5A83) TTerminal::~TTerminal
(000952C6) TManagedTerminal::~TManagedTerminal
(000968D4) TTerminalManager::FreeTerminal
(00095E9B) TTerminalManager::FreeActiveTerminal
(0009635C) TTerminalManager::ConnectActiveTerminal
(00096BE0) TTerminalManager::DoSetActiveTerminal
(0009696A) TTerminalManager::SetActiveTerminal
(00095E9B) TTerminalManager::FreeActiveTerminal
(0009635C) TTerminalManager::ConnectActiveTerminal
(00096BE0) TTerminalManager::DoSetActiveTerminal
(0009696A) TTerminalManager::SetActiveTerminal
(00095E9B) TTerminalManager::FreeActiveTerminal
(0009635C) TTerminalManager::ConnectActiveTerminal
(00096BE0) TTerminalManager::DoSetActiveTerminal
(0009696A) TTerminalManager::SetActiveTerminal
(0001C3C9) TCustomScpExplorerForm::NeedSession
(00023F5C) TCustomScpExplorerForm::CMShowingChanged
(00023DC6) TCustomScpExplorerForm::Dispatch
(0025BD51) Vcl::Controls::TWinControl::WndProc
(00216218) Vcl::Forms::TCustomForm::WndProc
(0085D3DC) Vclcommon::C2790_0

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 5.15.9

Error message:
Invalid access to memory.

Stack trace:
(007315AB) TFTPFileSystem::HandleCapabilities
(0092812A) C5157_3
(0092A192) ____ExceptionHandler
(00926F4C) __ExceptionHandler
(0005A466) ntdll.dll
(0000F12E) ntdll.dll.KiUserExceptionDispatcher
(0072B804) TFTPFileSystem::ProcessMessage
(0072B821) TFTPFileSystem::DiscardMessages
(00812947) TTerminal::~TTerminal
(000AA3FE) TManagedTerminal::~TManagedTerminal
(000ABAA5) TTerminalManager::FreeTerminal
(000AAF7F) TTerminalManager::FreeActiveTerminal
(000AB538) TTerminalManager::ConnectActiveTerminal
(000ABDB4) TTerminalManager::DoSetActiveTerminal
(000ABB3E) TTerminalManager::SetActiveTerminal
(0001FC81) TCustomScpExplorerForm::NeedSession
(000274E8) TCustomScpExplorerForm::CMShowingChanged
(0002731E) TCustomScpExplorerForm::Dispatch
(00279219) Vcl::Controls::TWinControl::WndProc
(002336E0) Vcl::Forms::TCustomForm::WndProc
(008C6190) Vclcommon::C2842_0

(007315AB) TFTPFileSystem::HandleCapabilities
(0005A466) ntdll.dll
(0000F12E) ntdll.dll.KiUserExceptionDispatcher
(0072B804) TFTPFileSystem::ProcessMessage
(0072B821) TFTPFileSystem::DiscardMessages
(00812947) TTerminal::~TTerminal
(000AA3FE) TManagedTerminal::~TManagedTerminal
(000ABAA5) TTerminalManager::FreeTerminal
(000AAF7F) TTerminalManager::FreeActiveTerminal
(000AB538) TTerminalManager::ConnectActiveTerminal
(000ABDB4) TTerminalManager::DoSetActiveTerminal
(000ABB3E) TTerminalManager::SetActiveTerminal
(0001FC81) TCustomScpExplorerForm::NeedSession
(

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 5.18.2

Error message:
メモリのアクセス違反

スタック トレース:
(00CC303F) TFTPFileSystem::HandleCapabilities
(00FB0E46) C5290_3
(00FB2EAE) ____ExceptionHandler
(00FAFC68) __ExceptionHandler
(0003EC9E) ntdll.dll.ZwWow64CallFunction64
(0003F42A) ntdll.dll.KiUserExceptionDispatcher
(00CBC7AC) TFTPFileSystem::ProcessMessage
(00CBC7E3) TFTPFileSystem::DiscardMessages
(00CAF4FF) TFTPFileSystem::~TFTPFileSystem
(00DAEBEF) TTerminal::~TTerminal
(000AEF26) TManagedTerminal::~TManagedTerminal
(000B0719) TTerminalManager::FreeTerminal
(000AFB1F) TTerminalManager::FreeActiveTerminal
(000B0143) TTerminalManager::ConnectActiveTerminal
(000B0A65) TTerminalManager::DoSetActiveTerminal
(000B07B2) TTerminalManager::SetActiveTerminal
(00020CB6) TCustomScpExplorerForm::NeedSession
(0002888E) TCustomScpExplorerForm::CMShowingChanged
(000286A7) TCustomScpExplorerForm::Dispatch
(0027FD71) Vcl::Controls::TWinControl::WndProc
(0023A238) Vcl::Forms::TCustomForm::WndProc
(00E6A560) Vclcommon::C2986_0

(00CC303F) TFTPFileSystem::HandleCapabilities
(0003EC9E) ntdll.dll.ZwWow64CallFunction64
(0003F42A) ntdll.dll.KiUserExceptionDispatcher
(00CBC7AC) TFTPFileSystem::ProcessMessage
(00CBC7E3) TFTPFileSystem::DiscardMessages
(00CAF4FF) TFTPFileSystem::~TFTPFileSystem
(00DAEBEF) TTerminal::~TTerminal
(000AEF26) TManagedTerminal::~TManagedTerminal
(000B0719) TTerminalManager::FreeTerminal
(000AFB1F) TTerminalManage

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 5.18.2

Error message:
メモリのアクセス違反

スタック トレース:
(00CC303F) TFTPFileSystem::HandleCapabilities
(00FB0E46) C5290_3
(00FB2EAE) ____ExceptionHandler
(00FAFC68) __ExceptionHandler
(0003EC9E) ntdll.dll.ZwWow64CallFunction64
(0003F42A) ntdll.dll.KiUserExceptionDispatcher
(00CBC7AC) TFTPFileSystem::ProcessMessage
(00CBC7E3) TFTPFileSystem::DiscardMessages
(00CAF4FF) TFTPFileSystem::~TFTPFileSystem
(00DAEBEF) TTerminal::~TTerminal
(000AEF26) TManagedTerminal::~TManagedTerminal
(000B0719) TTerminalManager::FreeTerminal
(000AFB1F) TTerminalManager::FreeActiveTerminal
(000B0143) TTerminalManager::ConnectActiveTerminal
(000B0A65) TTerminalManager::DoSetActiveTerminal
(000B07B2) TTerminalManager::SetActiveTerminal
(00020CB6) TCustomScpExplorerForm::NeedSession
(00020C2E) TCustomScpExplorerForm::LastTerminalClosed
(000B07B2) TTerminalManager::SetActiveTerminal
(000AFB1F) TTerminalManager::FreeActiveTerminal
(0027FD71) Vcl::Controls::TWinControl::WndProc
(0027F3B8) Vcl::Controls::TWinControl::MainWndProc
(003C73A8) System::Classes::_18201
(00007FFF) USER32.DLL.CallNextHookEx
(0000825C) USER32.DLL
(00010350) USER32.DLL.CallWindowProcW
(0049DE9F) Dragdrop::TDragDrop::WndMethod
(003C73A8) System::Classes::_18201
(00007FFF) USER32.DLL.CallNextHookEx
(0000825C) USER32.DLL
(000097FA) USER32.DLL
(0000986B) USER32.DLL.DispatchMessageW

(00CC303F) TFTPFileSystem::HandleCapabilities

The problem happens rarely. I cannot reproduce it.

komura.takashi.job@... wrote:

WinSCP 5.18.2

Error message:
メモリのアクセス違反

スタック トレース:
(00FB0E46) C5290_3
(00FB2EAE) ____ExceptionHandler
(00FAFC68) __ExceptionHandler
(00CC303F) TFTPFileSystem::HandleCapabilities
(0003EC9E) ntdll.dll.ZwWow64CallFunction64
(0003F42A) ntdll.dll.KiUserExceptionDispatcher
(00CBC7AC) TFTPFileSystem::ProcessMessage
(00CBC7E3) TFTPFileSystem::DiscardMessages
(00CAF4FF) TFTPFileSystem::~TFTPFileSystem
(00DAEBEF) TTerminal::~TTerminal
...

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.

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 5.17.10

Error message:
Invalid access to memory.

Stack trace:
(00C9FA07) TFTPFileSystem::HandleCapabilities
(00F8A13A) C5296_0
(00F8C1A2) ____ExceptionHandler
(00F88F5C) __ExceptionHandler
(0008627F) ntdll.dll
(00072C01) ntdll.dll.KiUserExceptionDispatcher
(00C99AF0) TFTPFileSystem::ProcessMessage
(00C99B0D) TFTPFileSystem::DiscardMessages
(00D89ADF) TTerminal::~TTerminal
(000AADAA) TManagedTerminal::~TManagedTerminal
(000AC569) TTerminalManager::FreeTerminal
(000AB9A3) TTerminalManager::FreeActiveTerminal
(000ABF98) TTerminalManager::ConnectActiveTerminal
(000AC8B5) TTerminalManager::DoSetActiveTerminal
(000AC602) TTerminalManager::SetActiveTerminal
(0002083F) TCustomScpExplorerForm::NeedSession
(000207B6) TCustomScpExplorerForm::LastTerminalClosed
(000AC602) TTerminalManager::SetActiveTerminal
(000AB9A3) TTerminalManager::FreeActiveTerminal
(000ABF98) TTerminalManager::ConnectActiveTerminal
(000AC8B5) TTerminalManager::DoSetActiveTerminal
(000AC602) TTerminalManager::SetActiveTerminal
(0002083F) TCustomScpExplorerForm::NeedSession
(00028270) TCustomScpExplorerForm::CMShowingChanged
(000280A7) TCustomScpExplorerForm::Dispatch
(0027AD15) Vcl::Controls::TWinControl::WndProc
(002351DC) Vcl::Forms::TCustomForm::WndProc
(00E43880) Vclcommon::C2992_0

(00C9FA07) TFTPFileSystem::HandleCapabilities
(00F8A13A) C5296_0
(00F8C1A2) ____ExceptionHandler
(00F88F5C) __ExceptionHandler
(0008627F) ntdll.dll
(00072C01) ntdll.dll.KiUserExceptionDispatcher
(00C99AF0) TFTPFileSystem::ProcessMessage
(00C99B0D) TFTPFileSystem::DiscardMessages
(00D89ADF) TTerminal::~TTerminal
(000AADAA) TManagedTerminal::~TManagedTerminal
(000AC569) TTerminalManager::FreeTerminal
(000AB9A3) TTerminalManager::FreeActiveTerminal
(000ABF98) TTerminalManager::ConnectActiveTerminal
(000AC8B5) TTerminalManager::DoSetActiveTerminal
(000AC602) TTerminalManager::SetActiveTerminal
(0002083F) TCustomScpExplorerForm::NeedSession
(000207B6) TCustomScpExplorerForm::LastTerminalClosed
(000AC602) TTerminalManager::SetActiveTerminal
(000AB9A3) TTerminalManager::FreeActiveTerminal
(000ABF98) TTerminalManager::ConnectActiveTerminal
(000AC8B5) TTerminalManager::DoSetActiveTerminal
(000AC602) TTerminalManager::SetActiveTerminal
(0002083F) TCustomScpExplorerForm::NeedSession
(00028270) TCustomScpExplorerForm::CMShowingChanged
(000280A7) TCustomScpExplorerForm::Dispatch
(0027AD15) Vcl::Controls::TWinControl::WndProc
(002351DC) Vcl::Forms::TCustomForm::WndProc
(00E43880) Vclcommon::C2992_0

(00C9FA07) TFTPFileSystem::HandleCapabilities
(0008627F) ntdll.dll
(00072C01) ntdll.dll.KiUserExceptionDispatcher
(00C99AF0) TFTPFileSystem::ProcessMessage
(00C99B0D) TFTPFileSystem::DiscardMessages
(00D89ADF) TTerminal::~TTerminal
(000AADAA) TManagedTerminal::~TManagedTerminal
(000AC569) TTerminalManager::FreeTerminal
(000AB9A3) TTerminalManager::FreeActiveTerminal
(000ABF98) TTerminalManager::ConnectActiveTerminal
(000AC8B5) TTerminalManager::DoSetActiveTerminal
(000AC602) TTerminalManager::SetActiveTerminal
%0

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 5.17.10

Error message:
Invalid access to memory.

Stack trace:
(00C9FA07) TFTPFileSystem::HandleCapabilities
(00F8A13A) C5296_0
(00F8C1A2) ____ExceptionHandler
(00F88F5C) __ExceptionHandler
(00088F9F) ntdll.dll
(000741F1) ntdll.dll.KiUserExceptionDispatcher
(00C99AF0) TFTPFileSystem::ProcessMessage
(00C99B0D) TFTPFileSystem::DiscardMessages
(00D89ADF) TTerminal::~TTerminal
(000AADAA) TManagedTerminal::~TManagedTerminal
(000AC569) TTerminalManager::FreeTerminal
(000AB9A3) TTerminalManager::FreeActiveTerminal
(000ABF98) TTerminalManager::ConnectActiveTerminal
(000AC8B5) TTerminalManager::DoSetActiveTerminal
(000AC602) TTerminalManager::SetActiveTerminal
(0002083F) TCustomScpExplorerForm::NeedSession
(000207B6) TCustomScpExplorerForm::LastTerminalClosed
(000AC602) TTerminalManager::SetActiveTerminal
(000AB9A3) TTerminalManager::FreeActiveTerminal
(000ABF98) TTerminalManager::ConnectActiveTerminal
(000AC8B5) TTerminalManager::DoSetActiveTerminal
(000AC602) TTerminalManager::SetActiveTerminal
(0002083F) TCustomScpExplorerForm::NeedSession
(000207B6) TCustomScpExplorerForm::LastTerminalClosed
(000AC602) TTerminalManager::SetActiveTerminal
(000AB9A3) TTerminalManager::FreeActiveTerminal
(000ABF98) TTerminalManager::ConnectActiveTerminal
(000AC8B5) TTerminalManager::DoSetActiveTerminal
(000AC602) TTerminalManager::SetActiveTerminal
(0002083F) TCustomScpExplorerForm::NeedSession
(000207B6) TCustomScpExplorerForm::LastTerminalClosed
(000AC602) TTerminalManager::SetActiveTerminal
(000AB9A3) TTerminalManager::FreeActiveTerminal
(000ABF98) TTerminalManager::ConnectActiveTerminal
(000AC8B5) TTerminalManager::DoSetActiveTerminal
(000AC602) TTerminalManager::SetActiveTerminal
(0002083F) TCustomScpExplorerForm::NeedSession
(00028270) TCustomScpExplorerForm::CMShowingChanged
(000280A7) TCustomScpExplorerForm::Dispatch
(0027AD15) Vcl::Controls::TWinControl::WndProc
(002351DC) Vcl::Forms::TCustomForm::WndProc
(00E43880) Vclcommon::C2992_0

(00C9FA07) TFTPFileSystem::HandleCapabilities
(00F8A13A) C5296_0
(00F8C1A2) ____ExceptionHandler
(00F88F5C) __ExceptionHandler
(00088F9F) ntdll.dll
(000741F1) ntdll.dll.KiUserExceptionDispatcher
(00C99AF0) TFTPFileSystem::ProcessMessage
(00C99B0D) TFTPFileSystem::DiscardMessages
(00D89ADF) TTerminal::~TTerminal
(000AADAA) TManagedTerminal::~TManagedTerminal
(000AC569) TTerminalManager::FreeTerminal
(000AB9A3) TTerminalManager::FreeActiveTerminal
(000ABF98) TTerminalManager::ConnectActiveTerminal
(000AC8B5) TTerminalManager::DoSetActiveTerminal
(000AC602) TTerminalManager::SetActiveTerminal
(0002083F) TCustomScpExplorerForm::NeedSession
(000207B6) TCustomScpExplorerForm::LastTerminalClosed
(000AC602) TTerminalManager::SetActiveTerminal
(000AB9A3) TTerminalManager::FreeActiveTerminal
(000ABF98) TTerminalManager::ConnectActiveTerminal
(000AC8B5) TTerminalManager::DoSetActiveTerminal
(000AC602) TTerminalManager::SetActiveTerminal
(0002083F) TCustomScpExplorerForm::NeedSession
(000207B6) TCustomScpExplorerForm::LastTerminalClosed
(000AC602) TTerminalManager::S

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 5.17.10

Error message:
Invalid access to memory.

Stack trace:
(00C9FA07) TFTPFileSystem::HandleCapabilities
(00F8A13A) C5296_0
(00F8C1A2) ____ExceptionHandler
(00F88F5C) __ExceptionHandler
(0007E1AF) ntdll.dll
(0006BD91) ntdll.dll.KiUserExceptionDispatcher
(00C99AF0) TFTPFileSystem::ProcessMessage
(00C99B0D) TFTPFileSystem::DiscardMessages
(00D89ADF) TTerminal::~TTerminal
(000AADAA) TManagedTerminal::~TManagedTerminal
(000AC569) TTerminalManager::FreeTerminal
(000AB9A3) TTerminalManager::FreeActiveTerminal
(000ABF98) TTerminalManager::ConnectActiveTerminal
(000AC8B5) TTerminalManager::DoSetActiveTerminal
(000AC602) TTerminalManager::SetActiveTerminal
(0002083F) TCustomScpExplorerForm::NeedSession
(00028270) TCustomScpExplorerForm::CMShowingChanged
(000280A7) TCustomScpExplorerForm::Dispatch
(0027AD15) Vcl::Controls::TWinControl::WndProc
(002351DC) Vcl::Forms::TCustomForm::WndProc
(00E43880) Vclcommon::C2992_0

(00C9FA07) TFTPFileSystem::HandleCapabilities
(0007E1AF) ntdll.dll
(0006BD91) ntdll.dll.KiUserExceptionDispatcher
(00C99AF0) TFTPFileSystem::ProcessMessage
(00C99B0D) TFTPFileSystem::DiscardMessages
(00D89ADF) TTerminal::~TTerminal
(000AADAA) TManagedTerminal::~TManagedTerminal
(000AC569) TTerminalManager::FreeTerminal
(000AB9A3) TTerminalManager::FreeActiveTerminal
(000ABF98) TTerminalManager::ConnectActiveTerminal
(000AC8B5) TTerminalManager::DoSetActiveTerminal
(000AC602) TTerminalManager::SetActiveTerminal
(0002083F) TCustomScpExplorerForm::NeedSession
(00028270) TCustomScpExplorerForm::CMShowingChanged
(000280A7) TCustomScpExplorerForm::Dispatch
(0027AD15) Vcl::Controls::TWinControl::WndProc
(002351DC) Vcl::Forms::TCustomForm::WndProc
(00E43880) Vclcommon::C2992_0

(00C9FA07) TFTPFileSystem::HandleCapabilities
(00F8A13A) C5296_0
(00F8C1A2) ____ExceptionHandler
(00F88F5C) __ExceptionHandler
(0007E1AF) ntdll.dll
(0006BD91) ntdll.dll.KiUserExceptionDispatcher
(00C99AF0) TFTPFileSystem::ProcessMessage
(00C99B0D) TFTPFileSystem::DiscardMessages
(00D89ADF) TTerminal::~TTerminal
(000AADAA) TManagedTerminal::~TManagedTerminal
(000AC569) TTerminalManager::FreeTerminal
(000AB9A3) TTerminalManager::FreeActiveTerminal
(000ABF98) TTerminalManager::ConnectActiveTerminal
(000AC8B5) TTerminalManager::DoSetActiveTerminal
(000AC602) TTerminalManager::SetActiveTerminal
(0002083F) TCustomScpExplorerForm::NeedSession
(00028270) TCustomScpExplorerForm::CMShowingChanged
(000280A7) TCustomScpExplorerForm::Dispatch
(0027AD15) Vcl::Controls::TWinControl::WndProc
(002351DC) Vcl::Forms::TCustomForm::WndProc
(00E43880) Vclcommon::C2992_0

The problem happens rarely. I cannot reproduce it.

Simply trying to connect to a previously working session...


WinSCP 5.21.6

Error message:
Invalid access to memory.

Stack trace:
(00CDFEA7) TFTPFileSystem::HandleCapabilities
(00FDF74E) C5412_0
(00FE17B6) ____ExceptionHandler
(00FDE570) __ExceptionHandler
(00097C6F) ntdll.dll
(00077BA1) ntdll.dll.KiUserExceptionDispatcher
(00CD933C) TFTPFileSystem::ProcessMessage
(00CD9373) TFTPFileSystem::DiscardMessages
(00CCBC5B) TFTPFileSystem::~TFTPFileSystem
(00DD5C87) TTerminal::~TTerminal
(000B218E) TManagedTerminal::~TManagedTerminal
(000B3AA9) TTerminalManager::FreeTerminal
(000B2EAF) TTerminalManager::FreeActiveTerminal
(000B34D3) TTerminalManager::ConnectActiveTerminal
(000B3E14) TTerminalManager::DoSetActiveTerminal
(000B3B42) TTerminalManager::SetActiveTerminal
(00021F5A) TCustomScpExplorerForm::NeedSession
(0002A123) TCustomScpExplorerForm::CMShowingChanged
(00029EF7) TCustomScpExplorerForm::Dispatch
(00282491) Vcl::Controls::TWinControl::WndProc
(0023C958) Vcl::Forms::TCustomForm::WndProc
(00E95D9C) Vclcommon::C3109_0

(00CDFEA7) TFTPFileSystem::HandleCapabilities
(00097C6F) ntdll.dll
(00077BA1) ntdll.dll.KiUserExceptionDispatcher
(00CD933C) TFTPFileSystem::ProcessMessage
(00CD9373) TFTPFileSystem::DiscardMessages
(00CCBC5B) TFTPFileSystem::~TFTPFileSystem
(00DD5C87) TTerminal::~TTerminal
(000B218E) TManagedTerminal::~TManagedTerminal
(000B3AA9) TTerminalManager::FreeTerminal
(000B2EAF) TTerminalManager::FreeActiveTerminal
(000B34D3) TTerminalManager::ConnectActiveTerminal
(000B3E14) TTerminalManager::DoSetActiveTerminal
(000B3B42) TTerminalManager::SetActiveTerminal
(00021F5A) TCustomScpExplorerForm::NeedSession
(0002A123) TCustomScpExplorerForm::CMShowingChanged
(00029EF7) TCustomScpExplorerForm::Dispatch
(00282491) Vcl::Controls::TWinControl::WndProc
(0023C958) Vcl::Forms::TCustomForm::WndProc
(00E95D9C) Vclcommon::C3109_0

(00CDFEA7) TFTPFileSystem::HandleCapabilities
(00FDF74E) C5412_0
(00FE17B6) ____ExceptionHandler
(00FDE570) __ExceptionHandler
(00097C6F) ntdll.dll
(00077BA1) ntdll.dll.KiUserExceptionDispatcher
(00CD933C) TFTPFileSystem::ProcessMessage
(00CD9373) TFTPFileSystem::DiscardMessages
(00CCBC5B) TFTPFileSystem::~TFTPFileSystem
(00DD5C87) TTerminal::~TTerminal
(000B218E) TManagedTerminal::~TManagedTerminal
(000B3AA9) TTerminalManager::FreeTerminal
(000B2EAF) TTerminalManager::FreeActiveTerminal
(000B34D3) TTerminalManager::ConnectActiveTerminal
(000B3E14) TTerminalManager::DoSetActiveTerminal
(000B3B42) TTerminalManager::SetActiveTerminal
(00021F5A) TCustomScpExplorerForm::NeedSession
(0002A123) TCustomScpExplorerForm::CMShowingChanged
(00029EF7) TCustomScpExplorerForm::Dispatch
(00282491) Vcl::Controls::TWinControl::WndProc
(0023C958) Vcl::Forms::TCustomForm::WndProc
(00E95D9C) Vclcommon::C3109_0

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 5.21.7

Error message:
Invalid access to memory.

Stack trace:
(00CDFED3) TFTPFileSystem::HandleCapabilities
(00FDF7C2) C5412_0
(00FE182A) ____ExceptionHandler
(00FDE5E4) __ExceptionHandler
(000974CF) ntdll.dll
(00077751) ntdll.dll.KiUserExceptionDispatcher
(00CD9368) TFTPFileSystem::ProcessMessage
(00CD939F) TFTPFileSystem::DiscardMessages
(00CCBC87) TFTPFileSystem::~TFTPFileSystem
(00DD5CB3) TTerminal::~TTerminal
(000B21BA) TManagedTerminal::~TManagedTerminal
(000B3AD5) TTerminalManager::FreeTerminal
(000B2EDB) TTerminalManager::FreeActiveTerminal
(000B34FF) TTerminalManager::ConnectActiveTerminal
(000B3E40) TTerminalManager::DoSetActiveTerminal
(000B3B6E) TTerminalManager::SetActiveTerminal
(00021F5A) TCustomScpExplorerForm::NeedSession
(0002A123) TCustomScpExplorerForm::CMShowingChanged
(00029EF7) TCustomScpExplorerForm::Dispatch
(002824BD) Vcl::Controls::TWinControl::WndProc
(0023C984) Vcl::Forms::TCustomForm::WndProc
(00E95E10) Vclcommon::C3109_0

(00CDFED3) TFTPFileSystem::HandleCapabilities
(000974CF) ntdll.dll
(00077751) ntdll.dll.KiUserExceptionDispatcher
(00CD9368) TFTPFileSystem::ProcessMessage
(00CD939F) TFTPFileSystem::DiscardMessages
(00CCBC87) TFTPFileSystem::~TFTPFileSystem
(00DD5CB3) TTerminal::~TTerminal
(000B21BA) TManagedTerminal::~TManagedTerminal
(000B3AD5) TTerminalManager::FreeTerminal
(000B2EDB) TTerminalManager::FreeActiveTerminal
(000B34FF) TTerminalManager::ConnectActiveTerminal
(000B3E40) TTerminalManager::DoSetActiveTerminal
(000B3B6E) TTerminalManager::SetActiveTerminal
(00021F5A) TCustomScpExplorerForm::NeedSession
(0002A123) TCustomScpExplorerForm::CMShowingChanged
(00029EF7) TCustomScpExplorerForm::Dispatch
(002824BD) Vcl::Controls::TWinControl::WndProc
(0023C984) Vcl::Forms::TCustomForm::WndProc
(00E95E10) Vclcommon::C3109_0

(00CDFED3) TFTPFileSystem::HandleCapabilities
(00FDF7C2) C5412_0
(00FE182A) ____ExceptionHandler
(00FDE5E4) __ExceptionHandler
(000974CF) ntdll.dll
(00077751) ntdll.dll.KiUserExceptionDispatcher
(00CD9368) TFTPFileSystem::ProcessMessage
(00CD939F) TFTPFileSystem::DiscardMessages
(00CCBC87) TFTPFileSystem::~TFTPFileSystem
(00DD5CB3) TTerminal::~TTerminal
(000B21BA) TManagedTerminal::~TManagedTerminal
(000B3AD5) TTerminalManager::FreeTerminal
(000B2EDB) TTerminalManager::FreeActiveTerminal
(000B34FF) TTerminalManager::ConnectActiveTerminal
(000B3E40) TTerminalManager::DoSetActiveTerminal
(000B3B6E) TTerminalManager::SetActiveTerminal
(00021F5A) TCustomScpExplorerForm::NeedSession
(0002A123) TCustomScpExplorerForm::CMShowingChanged
(00029EF7) TCustomScpExplorerForm::Dispatch
(002824BD) Vcl::Controls::TWinControl::WndProc
(0023C984) Vcl::Forms::TCustomForm::WndProc
(00E95E10) Vclcommon::C3109_0

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 5.21.7

Error message:
Invalid access to memory.

Stack trace:
(00CDFED3) TFTPFileSystem::HandleCapabilities
(00FDF7C2) C5412_0
(00FE182A) ____ExceptionHandler
(00FDE5E4) __ExceptionHandler
(000974CF) ntdll.dll
(00077751) ntdll.dll.KiUserExceptionDispatcher
(00CD9368) TFTPFileSystem::ProcessMessage
(00CD939F) TFTPFileSystem::DiscardMessages
(00CCBC87) TFTPFileSystem::~TFTPFileSystem
(00DD5CB3) TTerminal::~TTerminal
(000B21BA) TManagedTerminal::~TManagedTerminal
(000B3AD5) TTerminalManager::FreeTerminal
(000B38E6) TTerminalManager::FreeAll
(000B27A3) TTerminalManager::~TTerminalManager
(000B2260) TTerminalManager::DestroyInstance
(0010B1B5) Execute
(000027FA) wWinMain
(00FDD7D5) __wstartup
(0006A749) ntdll.dll
(0006A6CA) ntdll.dll

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.

@coates166: 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 6.1.1

Error message:
Invalid access to memory.

Stack trace:
(00CF8A3B) TFTPFileSystem::HandleCapabilities
(0100350E) C6083_0
(01005576) ____ExceptionHandler
(01002330) __ExceptionHandler
(000974CF) ntdll.dll
(00077751) ntdll.dll.KiUserExceptionDispatcher
(00CF1DD4) TFTPFileSystem::ProcessMessage
(00CF1E0B) TFTPFileSystem::DiscardMessages
(00CE4407) TFTPFileSystem::~TFTPFileSystem
(00DF488B) TTerminal::~TTerminal
(000BC350) TManagedTerminal::~TManagedTerminal
(000BDED3) TTerminalManager::FreeTerminal
(000BD1EF) TTerminalManager::FreeActiveTerminal
(000BD840) TTerminalManager::ConnectActiveTerminal
(000BE2B5) TTerminalManager::DoSetActiveSession
(000BDF8C) TTerminalManager::SetActiveSession
(0002396C) TCustomScpExplorerForm::NeedSession
(00057B57) TScpCommanderForm::NeedSession
(0002BCA5) TCustomScpExplorerForm::CMShowingChanged
(0002BA67) TCustomScpExplorerForm::Dispatch
(003F62DD) Vcl::Controls::TWinControl::WndProc
(003B07EC) Vcl::Forms::TCustomForm::WndProc
(00EB9838) Vclcommon::C3781_0

(00CF8A3B) TFTPFileSystem::HandleCapabilities
(000974CF) ntdll.dll
(00077751) ntdll.dll.KiUserExceptionDispatcher
(00CF1DD4) TFTPFileSystem::ProcessMessage
(00CF1E0B) TFTPFileSystem::DiscardMessages
(00CE4407) TFTPFileSystem::~TFTPFileSystem
(00DF488B) TTerminal::~TTerminal
(000BC350) TManagedTerminal::~TManagedTerminal
(000BDED3) TTerminalManager::FreeTerminal
(000BD1EF) TTerminalManager::FreeActiveTerminal
(000BD840) TTerminalManager::ConnectActiveTerminal
(000BE2B5) TTerminalManager::DoSetActiveSession
(000BDF8C) TTerminalManager::SetActiveSession
(0002396C) TCustomScpExplorerForm::NeedSession
(00057B57) TScpCommanderForm::NeedSession
(0002BCA5) TCustomScpExplorerForm::CMShowingChanged
(0002BA67) TCustomScpExplorerForm::Dispatch
(003F62DD) Vcl::Controls::TWinControl::WndProc
(003B07EC) Vcl::Forms::TCustomForm::WndProc
(00EB9838) Vclcommon::C3781_0

(00CF8A3B) TFTPFileSystem::HandleCapabilities
(0100350E) C6083_0
(01005576) ____ExceptionHandler
(01002330) __ExceptionHandler
(000974CF) ntdll.dll
(00077751) ntdll.dll.KiUserExceptionDispatcher
(00CF1DD4) TFTPFileSystem::ProcessMessage
(00CF1E0B) TFTPFileSystem::DiscardMessages
(00CE4407) TFTPFileSystem::~TFTPFileSystem
(00DF488B) TTerminal::~TTerminal
(000BC350) TManagedTerminal::~TManagedTerminal
(000BDED3) TTerminalManager::FreeTerminal
(000BD1EF) TTerminalManager::FreeActiveTerminal
(000BD840) TTerminalManager::ConnectActiveTerminal
(000BE2B5) TTerminalManager::DoSetActiveSession
(000BDF8C) TTerminalManager::SetActiveSession
(0002396C) TCustomScpExplorerForm::NeedSession
(00057B57) TScpCommanderForm::NeedSession
(0002BCA5) TCustomScpExplorerForm::CMShowingChanged
(0002BA67) TCustomScpExplorerForm::Dispatch
(003F62DD) Vcl::Controls::TWinControl::WndProc
(003B07EC) Vcl::Forms::TCustomForm::WndProc
(00EB9838) Vclcommon::C3781_0

The problem happens rarely. I cannot reproduce it.

Closing WinSCP. Two Instances were running, error happenend on closing second instance shortly after clsoing the first one. Connection on both was interruptede, as VPN was shut down

WinSCP 6.1.2

Error message:
Unzulässiger Zugriff auf einen Speicherbereich.

Stapelverfolgung:
(00CF92FB) TFTPFileSystem::HandleCapabilities
(01003DEA) C6083_0
(01005E52) ____ExceptionHandler
(01002C0C) __ExceptionHandler
(0009812F) ntdll.dll
(00077D31) ntdll.dll.KiUserExceptionDispatcher
(00CF2694) TFTPFileSystem::ProcessMessage
(00CF26CB) TFTPFileSystem::DiscardMessages
(00CE4CC7) TFTPFileSystem::~TFTPFileSystem
(00DF514B) TTerminal::~TTerminal
(000BCC04) TManagedTerminal::~TManagedTerminal
(000BE787) TTerminalManager::FreeTerminal
(000BE50A) TTerminalManager::FreeAll
(000BD1E3) TTerminalManager::~TTerminalManager
(000BCCAC) TTerminalManager::DestroyInstance
(001179EC) Execute
(000027EF) wWinMain
(01001DFD) C5951_0
(0006AD29) ntdll.dll
(0006ACAA) ntdll.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)>

WinSCP 6.1.2

Error message:
Unzulässiger Zugriff auf einen Speicherbereich.

Stapelverfolgung:
(00CF92FB) TFTPFileSystem::HandleCapabilities
(01003DEA) C6083_0
(01005E52) ____ExceptionHandler
(01002C0C) __ExceptionHandler
(00087A7F) ntdll.dll
(000740D1) ntdll.dll.KiUserExceptionDispatcher
(00CF2694) TFTPFileSystem::ProcessMessage
(00CF26CB) TFTPFileSystem::DiscardMessages
(00CE4CC7) TFTPFileSystem::~TFTPFileSystem
(00DF514B) TTerminal::~TTerminal
(000BCC04) TManagedTerminal::~TManagedTerminal
(000BE787) TTerminalManager::FreeTerminal
(000BDAA3) TTerminalManager::FreeActiveTerminal
(000BE0F4) TTerminalManager::ConnectActiveTerminal
(000BEB69) TTerminalManager::DoSetActiveSession
(000BE840) TTerminalManager::SetActiveSession
(0002396C) TCustomScpExplorerForm::NeedSession
(00057BBF) TScpCommanderForm::NeedSession
(0002BCA5) TCustomScpExplorerForm::CMShowingChanged
(0002BA67) TCustomScpExplorerForm::Dispatch
(003F6B91) Vcl::Controls::TWinControl::WndProc
(003B10A0) Vcl::Forms::TCustomForm::WndProc
(00EBA0F8) Vclcommon::C3781_0

(00CF92FB) TFTPFileSystem::HandleCapabilities
(00087A7F) ntdll.dll
(000740D1) ntdll.dll.KiUserExceptionDispatcher
(00CF2694) TFTPFileSystem::ProcessMessage
(00CF26CB) TFTPFileSystem::DiscardMessages
(00CE4CC7) TFTPFileSystem::~TFTPFileSystem
(00DF514B) TTerminal::~TTerminal
(000BCC04) TManagedTerminal::~TManagedTerminal
(000BE787) TTerminalManager::FreeTerminal
(000BDAA3) TTerminalManager::FreeActiveTerminal
(000BE0F4) TTerminalManager::ConnectActiveTerminal
(000BEB69) TTerminalManager::DoSetActiveSession
(000BE840) TTerminalManager::SetActiveSession
(0002396C) TCustomScpExplorerForm::NeedSession
(00057BBF) TScpCommanderForm::NeedSession
(0002BCA5) TCustomScpExplorerForm::CMShowingChanged
(0002BA67) TCustomScpExplorerForm::Dispatch
(003F6B91) Vcl::Controls::TWinControl::WndProc
(003B10A0) Vcl::Forms::TCustomForm::WndProc
(00EBA0F8) Vclcommon::C3781_0

(00CF92FB) TFTPFileSystem::HandleCapabilities
(01003DEA) C6083_0
(01005E52) ____ExceptionHandler
(01002C0C) __ExceptionHandler
(00087A7F) ntdll.dll
(000740D1) ntdll.dll.KiUserExceptionDispatcher
(00CF2694) TFTPFileSystem::ProcessMessage
(00CF26CB) TFTPFileSystem::DiscardMessages
(00CE4CC7) TFTPFileSystem::~TFTPFileSystem
(00DF514B) TTerminal::~TTerminal
(000BCC04) TManagedTerminal::~TManagedTerminal
(000BE787) TTerminalManager::FreeTerminal
(000BDAA3) TTerminalManager::FreeActiveTerminal
(000BE0F4) TTerminalManager::ConnectActiveTerminal
(000BEB69) TTerminalManager::DoSetActiveSession
(000BE840) TTerminalManager::SetActiveSession
(0002396C) TCustomScpExplorerForm::NeedSession
(00057BBF) TScpCommanderForm::NeedSession
(0002BCA5) TCustomScpExplorerForm::CMShowingChanged
(0002BA67) TCustomScpExplorerForm::Dispatch
(003F6B91) Vcl::Controls::TWinControl::WndProc
(003B10A0) Vcl::Forms::TCustomForm::WndProc
(00EBA0F8) Vclcommon::C3781_0

The problem happens rarely. I cannot reproduce it.