Invalid pointer operation - System::TObject::FreeInstance

Just close several sessions tabs by CTRL+W, till last tab. On last tab i saw error dialog message.
Perhaps i has problem with internet connection to server.

WinSCP 5.7.7

Error message:
Invalid pointer operation

Stack trace:
(003B071C) System::TObject::FreeInstance
(003B071C) System::TObject::FreeInstance
(0008378A) ShowExtendedExceptionEx
(0001AB28) TCustomScpExplorerForm::ShowExtendedException
(00077BDD) TTerminalManager::TerminalShowExtendedException
(0070FC38) TTerminal::ShowExtendedException
(000A9A85) Execute
(00002462) wWinMain
(007DEA01) C4667_0
(00038880) ntdll.dll
(00038850) 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 5.11.3

Error message:
Invalid pointer operation

Stack trace:
(003EC1B8) System::TObject::FreeInstance
(003EC1B8) System::TObject::FreeInstance
(0089D2F5) ___cleanupTObject
(0089F0A3) _CatchCleanup
(0077F27D) TSFTPFileSystem::SFTPSourceRobust
(0077E2FD) TSFTPFileSystem::CopyToRemote
(007AF5F1) TTerminal::CopyToParallel
(006E22AD) TParallelTransferQueueItem::DoExecute
(006E0D9A) TQueueItem::Execute
(006DFDD2) TTerminalItem::ProcessEvent
(006DE17C) TSignalThread::Execute
(000A0DD7) Userinterface::C20_0
(00016C02) KERNEL32.DLL.BaseThreadInitThunk
(00059D2D) ntdll.dll
(00059CF5) 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 5.13

Error message:
Invalid access to memory.

Stack trace:
(003EF1F4) System::TObject::FreeInstance
(003EF1F4) System::TObject::FreeInstance
(0037ED14) System::Classes::_18201
(0001D0B9) USER32.dll
(00027844) USER32.dll
(0002A140) USER32.dll
(000180D7) USER32.dll
(00017C1B) USER32.dll.DispatchMessageW

(003F0420) System::HandleAnyException
(00088D1F) ntdll.dll
(0006FC11) ntdll.dll.KiUserExceptionDispatcher
(0037ED14) System::Classes::_18201
(0001D0B9) USER32.dll
(00027844) USER32.dll
(0002A140) USER32.dll
(000180D7) USER32.dll
(00017C1B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

I left a session idle. When I returned it had popped up a dialog asking for the password to my private key ("Private key file" setting). I did not need to reconnect, so I clicked cancel. The result was this error followed by unending "Invalid access to memory" errors (another would pop up when I clicked OK, so I had to just kill the process).

WinSCP 5.13 (Build 8172)

Error message:
List index out of bounds (-1)

Stack trace:
(003EF1F4) System::TObject::FreeInstance
(003EF1F4) System::TObject::FreeInstance
(003EF2FC) System::TObject::Free
(000417DF) TScpCommanderForm::UpdateTerminal
(00005D6C) TCustomScpExplorerForm::TerminalChanging
(00094BF3) TTerminalManager::DoSetActiveTerminal
(00094B7E) TTerminalManager::SetActiveTerminal
(000940A3) TTerminalManager::FreeActiveTerminal
(00094892) TTerminalManager::ReconnectActiveTerminal
(000A315D) ShowExtendedExceptionEx
(0001D614) TCustomScpExplorerForm::ShowExtendedException
(00095D91) TTerminalManager::TerminalShowExtendedException
(007B5D6C) TTerminal::ShowExtendedException
(0021D912) Vcl::Forms::TApplication::HandleException
(0037ED14) System::Classes::_18201
(00032429) USER32.dll
(0002488E) USER32.dll
(0002421D) USER32.dll
(00023FEB) USER32.dll.DispatchMessageW

(00094986) TTerminalManager::FreeTerminal
(000851DF) ntdll.dll
(00073161) ntdll.dll.KiUserExceptionDispatcher
(000940A3) TTerminalManager::FreeActiveTerminal
(000A315D) ShowExtendedExceptionEx
(0001D614) TCustomScpExplorerForm::ShowExtendedException
(00095D91) TTerminalManager::TerminalShowExtendedException
(007B5D6C) TTerminal::ShowExtendedException
(0021D912) Vcl::Forms::TApplication::HandleException
(0037ED14) System::Classes::_18201
(00032429) USER32.dll
(0002488E) USER32.dll
(0002421D) USER32.dll
(00023FEB) USER32.dll.DispatchMessageW

(00361C91) System::Classes::TList::Get
(00361C91) System::

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

Error message:
List index out of bounds (-1)

Трассировка стека:
(003EF1F4) System::TObject::FreeInstance
(003EF1F4) System::TObject::FreeInstance
(003EF2FC) System::TObject::Free
(000417DF) TScpCommanderForm::UpdateTerminal
(00005D6C) TCustomScpExplorerForm::TerminalChanging
(00094BF3) TTerminalManager::DoSetActiveTerminal
(00094B7E) TTerminalManager::SetActiveTerminal
(000940A3) TTerminalManager::FreeActiveTerminal
(00094892) TTerminalManager::ReconnectActiveTerminal
(000A315D) ShowExtendedExceptionEx
(0001D614) TCustomScpExplorerForm::ShowExtendedException
(00095D91) TTerminalManager::TerminalShowExtendedException
(007B5D6C) TTerminal::ShowExtendedException
(0021D912) Vcl::Forms::TApplication::HandleException
(0037ED14) System::Classes::_18201
(00015235) USER32.dll
(000158E5) USER32.dll
(00016D2C) USER32.dll
(00016DF5) USER32.dll.DispatchMessageW

(00094986) TTerminalManager::FreeTerminal
(00045A86) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(000940A3) TTerminalManager::FreeActiveTerminal
(000A315D) ShowExtendedExceptionEx
(0001D614) TCustomScpExplorerForm::ShowExtendedException
(00095D91) TTerminalManager::TerminalShowExtendedException
(007B5D6C) TTerminal::ShowExtendedException
(0021D912) Vcl::Forms::TApplication::HandleException
(0037ED14) System::Classes::_18201
(00015235) USER32.dll
(000158E5) USER32.dll
(00016D2C) USER32.dll
(00016DF5) USER32.dll.DispatchMessageW

(00

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 5.13.1

Error message:
List index out of bounds (-1)

Stack trace:
(003EF240) System::TObject::FreeInstance
(003EF240) System::TObject::FreeInstance
(003EF348) System::TObject::Free
(000417DF) TScpCommanderForm::UpdateTerminal
(00005D6C) TCustomScpExplorerForm::TerminalChanging
(00094BF3) TTerminalManager::DoSetActiveTerminal
(00094B7E) TTerminalManager::SetActiveTerminal
(000940A3) TTerminalManager::FreeActiveTerminal
(00094892) TTerminalManager::ReconnectActiveTerminal
(000A31A9) ShowExtendedExceptionEx
(0001D614) TCustomScpExplorerForm::ShowExtendedException
(00095D91) TTerminalManager::TerminalShowExtendedException
(007B60E8) TTerminal::ShowExtendedException
(0021D95E) Vcl::Forms::TApplication::HandleException
(0037ED60) System::Classes::_18201
(0002C2B1) USER32.dll
(0000D895) USER32.dll
(0000D1EF) USER32.dll
(0000CFAB) USER32.dll.DispatchMessageW
(00019342)QIPCAP.dll

(00094986) TTerminalManager::FreeTerminal
(00081D0F) ntdll.dll
(0006F88A) ntdll.dll.KiUserExceptionDispatcher
(000940A3) TTerminalManager::FreeActiveTerminal
(000A31A9) ShowExtendedExceptionEx
(0001D614) TCustomScpExplorerForm::ShowExtendedException
(00095D91) TTerminalManager::TerminalShowExtendedException
(007B60E8) TTerminal::ShowExtendedException
(0021D95E) Vcl::Forms::TApplication::HandleException
(0037ED60) System::Classes::_18201
(0002C2B1) USER32.dll
(0000D895) USER32.dll
(0000D1EF) USER32.dll
(0000CFAB) USER32.dll.DispatchMessageW
(00019342)QIPCAP.dll

(00361CDD) System::

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 5.13

Error message:
List index out of bounds (-1)

Stack trace:
(003EF1F4) System::TObject::FreeInstance
(003EF1F4) System::TObject::FreeInstance
(003EF2FC) System::TObject::Free
(000417DF) TScpCommanderForm::UpdateTerminal
(00005D6C) TCustomScpExplorerForm::TerminalChanging
(00094BF3) TTerminalManager::DoSetActiveTerminal
(00094B7E) TTerminalManager::SetActiveTerminal
(000940A3) TTerminalManager::FreeActiveTerminal
(00094892) TTerminalManager::ReconnectActiveTerminal
(000A315D) ShowExtendedExceptionEx
(0001D614) TCustomScpExplorerForm::ShowExtendedException
(00095D91) TTerminalManager::TerminalShowExtendedException
(007B5D6C) TTerminal::ShowExtendedException
(0021D912) Vcl::Forms::TApplication::HandleException
(0037ED14) System::Classes::_18201
(0002C2B1) USER32.dll
(0000D885) USER32.dll
(0000D1DF) USER32.dll
(0000CF9B) USER32.dll.DispatchMessageW

(00094986) TTerminalManager::FreeTerminal
(00081D3F) ntdll.dll
(0006F8EA) ntdll.dll.KiUserExceptionDispatcher
(000940A3) TTerminalManager::FreeActiveTerminal
(000A315D) ShowExtendedExceptionEx
(0001D614) TCustomScpExplorerForm::ShowExtendedException
(00095D91) TTerminalManager::TerminalShowExtendedException
(007B5D6C) TTerminal::ShowExtendedException
(0021D912) Vcl::Forms::TApplication::HandleException
(0037ED14) System::Classes::_18201
(0002C2B1) USER32.dll
(0000D885) USER32.dll
(0000D1DF) USER32.dll
(0000CF9B) USER32.dll.DispatchMessageW

(00361C91) System::Classes::TList::Get
(00361C91) System::

The problem happens rarely. I cannot reproduce it.

mail2dsenthil@... wrote:

WinSCP 5.13.1

Error message:
List index out of bounds (-1)

Stack trace:
(003EF240) System::TObject::FreeInstance
(003EF240) System::TObject::FreeInstance
(003EF348) System::TObject::Free
(000417DF) TScpCommanderForm::UpdateTerminal
(00005D6C) TCustomScpExplorerForm::TerminalChanging
(00094BF3) TTerminalManager::DoSetActiveTerminal
(00094B7E) TTerminalManager::SetActiveTerminal
(00094892) TTerminalManager::ReconnectActiveTerminal
(000940A3) TTerminalManager::FreeActiveTerminal
(000A31A9) ShowExtendedExceptionEx
...

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 5.13.1

Error message:
List index out of bounds (-1)

Stack trace:
(003EF240) System::TObject::FreeInstance
(003EF240) System::TObject::FreeInstance
(003EF348) System::TObject::Free
(000417DF) TScpCommanderForm::UpdateTerminal
(00005D6C) TCustomScpExplorerForm::TerminalChanging
(00094BF3) TTerminalManager::DoSetActiveTerminal
(00094B7E) TTerminalManager::SetActiveTerminal
(000940A3) TTerminalManager::FreeActiveTerminal
(00094892) TTerminalManager::ReconnectActiveTerminal
(000A31A9) ShowExtendedExceptionEx
(0001D614) TCustomScpExplorerForm::ShowExtendedException
(00095D91) TTerminalManager::TerminalShowExtendedException
(007B60E8) TTerminal::ShowExtendedException
(0021D95E) Vcl::Forms::TApplication::HandleException
(0037ED60) System::Classes::_18201
(0002C311) USER32.dll
(0000D8D5) USER32.dll
(0000D22F) USER32.dll
(0000CFDB) USER32.dll.DispatchMessageW

(00094986) TTerminalManager::FreeTerminal
(00081D3F) ntdll.dll
(0006F8BA) ntdll.dll.KiUserExceptionDispatcher
(000940A3) TTerminalManager::FreeActiveTerminal
(000A31A9) ShowExtendedExceptionEx
(0001D614) TCustomScpExplorerForm::ShowExtendedException
(00095D91) TTerminalManager::TerminalShowExtendedException
(007B60E8) TTerminal::ShowExtendedException
(0021D95E) Vcl::Forms::TApplication::HandleException
(0037ED60) System::Classes::_18201
(0002C311) USER32.dll
(0000D8D5) USER32.dll
(0000D22F) USER32.dll
(0000CFDB) USER32.dll.DispatchMessageW

(00361CDD) System::Classes::TList::Get
(00361CDD) System:%

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:
List index out of bounds (-1)

Stack trace:
(003F08F0) System::TObject::FreeInstance
(003F08F0) System::TObject::FreeInstance
(003F09F8) System::TObject::Free
(0004265F) TScpCommanderForm::UpdateTerminal
(00005E00) TCustomScpExplorerForm::TerminalChanging
(00095F83) TTerminalManager::DoSetActiveTerminal
(00095F0E) TTerminalManager::SetActiveTerminal
(00095433) TTerminalManager::FreeActiveTerminal
(00095C22) TTerminalManager::ReconnectActiveTerminal
(000A4579) ShowExtendedExceptionEx
(0001D6F4) TCustomScpExplorerForm::ShowExtendedException
(00097121) TTerminalManager::TerminalShowExtendedException
(007B8328) TTerminal::ShowExtendedException
(0021EF6E) Vcl::Forms::TApplication::HandleException
(00380370) System::Classes::_18201
(0002C2B1) USER32.dll
(0000D885) USER32.dll
(0000D1DF) USER32.dll
(0000CF9B) USER32.dll.DispatchMessageW

(00095D16) TTerminalManager::FreeTerminal
(00081D3F) ntdll.dll
(0006F8EA) ntdll.dll.KiUserExceptionDispatcher
(00095433) TTerminalManager::FreeActiveTerminal
(000A4579) ShowExtendedExceptionEx
(0001D6F4) TCustomScpExplorerForm::ShowExtendedException
(00097121) TTerminalManager::TerminalShowExtendedException
(007B8328) TTerminal::ShowExtendedException
(0021EF6E) Vcl::Forms::TApplication::HandleException
(00380370) System::Classes::_18201
(0002C2B1) USER32.dll
(0000D885) USER32.dll
(0000D1DF) USER32.dll
(0000CF9B) USER32.dll.DispatchMessageW

(003632ED) System::Classes::TList::Get
(003632ED) System:%

The problem happens rarely. I cannot reproduce it.

this happen after restarting pc and press cancel on WinSCP trying to contact the server again and asking for a password
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.13.4

Error message:
List index out of bounds (-1)

Stack trace:
(003F12A0) System::TObject::FreeInstance
(003F12A0) System::TObject::FreeInstance
(003F13A8) System::TObject::Free
(0004265F) TScpCommanderForm::UpdateTerminal
(00005E00) TCustomScpExplorerForm::TerminalChanging
(000967CB) TTerminalManager::DoSetActiveTerminal
(00096756) TTerminalManager::SetActiveTerminal
(00095C9F) TTerminalManager::FreeActiveTerminal
(0009646A) TTerminalManager::ReconnectActiveTerminal
(000A4DE5) ShowExtendedExceptionEx
(0001D6F4) TCustomScpExplorerForm::ShowExtendedException
(00097969) TTerminalManager::TerminalShowExtendedException
(007B94BC) TTerminal::ShowExtendedException
(0021F91E) Vcl::Forms::TApplication::HandleException
(00380D20) System::Classes::_18201
(0003AE69) USER32.dll
(00037335) USER32.dll
(00036BE9) USER32.dll
(000369CB) USER32.dll.DispatchMessageW

(0009655E) TTerminalManager::FreeTerminal
(0007DAFF) ntdll.dll
(0006B711) ntdll.dll.KiUserExceptionDispatcher
(00095C9F) TTerminalManager::FreeActiveTerminal
(000A4DE5) ShowExtendedExceptionEx
(0001D6F4) TCustomScpExplorerForm::ShowExtendedException
(00097969) TTerminalManager::TerminalShowExtendedException
(007B94BC) TTerminal::ShowExtendedException
(0021F91E) Vcl::Forms::TApplication::HandleException
(00380D20) System::Classes::_18201
(0003AE69) USER32.dll
(00037335) USER32.dll
(00036BE9) USER32.dll
(000369CB) USER32.dll.DispatchMessageW

(00363C9D) System::Classes::TList::Get
(00363C9D) System::Classes::TList::Get
(00095C9F) TTerminalManager::FreeActiveTerminal
(000A4DE5) ShowExtendedExceptionEx
(0001D6F4) TCustomScpExplorerForm::ShowExtendedException
(00097969) TTerminalManager::TerminalShowExtendedException
(007B94BC) TTerminal::ShowExtendedException
(0021F91E) Vcl::Forms::TApplication::HandleException
(00380D20) System::Classes::_18201
(0003AE69) USER32.dll
(00037335) USER32.dll
(00036BE9) USER32.dll
(000369CB) 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 5.13.4

Error message:
List index out of bounds (-1)

Stack trace:
(003F12A0) System::TObject::FreeInstance
(003F12A0) System::TObject::FreeInstance
(003F13A8) System::TObject::Free
(0004265F) TScpCommanderForm::UpdateTerminal
(00005E00) TCustomScpExplorerForm::TerminalChanging
(000967CB) TTerminalManager::DoSetActiveTerminal
(00096756) TTerminalManager::SetActiveTerminal
(00095C9F) TTerminalManager::FreeActiveTerminal
(0009646A) TTerminalManager::ReconnectActiveTerminal
(000A4DE5) ShowExtendedExceptionEx
(0001D6F4) TCustomScpExplorerForm::ShowExtendedException
(00097969) TTerminalManager::TerminalShowExtendedException
(007B94BC) TTerminal::ShowExtendedException
(0021F91E) Vcl::Forms::TApplication::HandleException
(00380D20) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

(0009655E) TTerminalManager::FreeTerminal
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(00095C9F) TTerminalManager::FreeActiveTerminal
(000A4DE5) ShowExtendedExceptionEx
(0001D6F4) TCustomScpExplorerForm::ShowExtendedException
(00097969) TTerminalManager::TerminalShowExtendedException
(007B94BC) TTerminal::ShowExtendedException
(0021F91E) Vcl::Forms::TApplication::HandleException
(00380D20) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

(00363C9D) System::Classes::TList::Get
(00363C9D) System::Classes::TList::Get
(00095C9F) TTerminalManager::FreeActiveTerminal
(000A4DE5) ShowExtendedExceptionEx
(0001D6F4) TCustomScpExplorerForm::ShowExtendedException
(00097969) TTerminalManager::TerminalShowExtendedException
(007B94BC) TTerminal::ShowExtendedException
(0021F91E) Vcl::Forms::TApplication::HandleException
(00380D20) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

Stack trace:
(003F12A0) System::TObject::FreeInstance
(003F12A0) System::TObject::FreeInstance
(003F13A8) System::TObject::Free
(0004265F) TScpCommanderForm::UpdateTerminal
(00005E00) TCustomScpExplorerForm::TerminalChanging
(000967CB) TTerminalManager::DoSetActiveTerminal
(00096756) TTerminalManager::SetActiveTerminal
(00095C9F) TTerminalManager::FreeActiveTerminal
(0009646A) TTerminalManager::ReconnectActiveTerminal
(000A4DE5) ShowExtendedExceptionEx
(0001D6F4) TCustomScpExplorerForm::ShowExtendedException
(00097969) TTerminalManager::TerminalShowExtendedException
(007B94BC) TTerminal::ShowExtendedException
(0021F91E) Vcl::Forms::TApplication::HandleException
(00380D20) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

(0009655E) TTerminalManager::FreeTerminal
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(00095C9F) TTerminalManager::FreeActiveTerminal
(000A4DE5) ShowExtendedExceptionEx
(0001D6F4) TCustomScpExplorerForm::ShowExtendedException
(00097969) TTerminalManager::TerminalShowExtendedException
(007B94BC) TTerminal::ShowExtendedException
(0021F91E) Vcl::Forms::TApplication::HandleException
(00380D20) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

(00363C9D) System::Classes::TList::Get
(00363C9D) System:%

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.

Traza de la pila:
(003F08F0) System::TObject::FreeInstance
(003F08F0) System::TObject::FreeInstance
(003F09F8) System::TObject::Free
(0004265F) TScpCommanderForm::UpdateTerminal
(00005E00) TCustomScpExplorerForm::TerminalChanging
(00095F83) TTerminalManager::DoSetActiveTerminal
(00095F0E) TTerminalManager::SetActiveTerminal
(00095433) TTerminalManager::FreeActiveTerminal
(00095C22) TTerminalManager::ReconnectActiveTerminal
(000A4579) ShowExtendedExceptionEx
(0001D6F4) TCustomScpExplorerForm::ShowExtendedException
(00097121) TTerminalManager::TerminalShowExtendedException
(007B8328) TTerminal::ShowExtendedException
(0021EF6E) Vcl::Forms::TApplication::HandleException
(00380370) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

(00095D16) TTerminalManager::FreeTerminal
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(00095433) TTerminalManager::FreeActiveTerminal
(000A4579) ShowExtendedExceptionEx
(0001D6F4) TCustomScpExplorerForm::ShowExtendedException
(00097121) TTerminalManager::TerminalShowExtendedException
(007B8328) TTerminal::ShowExtendedException
(0021EF6E) Vcl::Forms::TApplication::HandleException
(00380370) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

(003632ED) System::Classes::TList::Get
(003632ED) System::Classes::TList::Get
(00095433) TTerminalManager::FreeActiveTerminal
(000A4579) ShowExtendedExceptionEx
(0001D6F4) TCustomScpExplorerForm::ShowExtendedException
(00097121) TTerminalManager::TerminalShowExtendedException
(007B8328) TTerminal::ShowExtendedException
(0021EF6E) Vcl::Forms::TApplication::HandleException
(00380370) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

Copying a directory with a large amount of files (10k) and in the same time unzipping (by 7zip) other files (about 18k) to the same directory.

WinSCP 5.15.5

Error message:
Invalid pointer operation

Stack trace:
(00416330) System::TObject::FreeInstance
(00416330) System::TObject::FreeInstance
(004513B2) Dirview::TDirView::SortItems
(00450341) Dirview::TDirView::Reload2
(00452AE4) Dirview::TDirView::TimerOnTimer
(003A3E44) System::Classes::_18201
(00043749) USER32.dll
(000250B7) USER32.dll
(00024209) USER32.dll
(00023FCB) 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 5.17.8

Error message:
Invalid pointer operation

Stack trace:
(00417DB8) System::TObject::FreeInstance
(00417DB8) System::TObject::FreeInstance
(00417EC0) System::TObject::Free
(0027AC61) Vcl::Controls::TWinControl::WndProc
(002BDF3B) Vcl::Comctrls::TCustomListView::WndProc
(003A58C4) System::Classes::_18201
(0003DF59) USER32.dll
(00034ED5) USER32.dll
(000345B2) USER32.dll
(00032756) USER32.dll.CallWindowProcW
(0007A8E7) COMCTL32.DLL
(0007A986) COMCTL32.DLL
(0007A73C) COMCTL32.DLL
(0003DF59) USER32.dll
(00034ED5) USER32.dll
(000345B2) USER32.dll
(00032756) USER32.dll.CallWindowProcW
(0047CC2B) Dragdrop::TDragDrop::WndMethod
(003A58C4) System::Classes::_18201
(0003DF59) USER32.dll
(00034ED5) USER32.dll
(00034AD5) USER32.dll
(0003869D) USER32.dll
(00072AEB) ntdll.dll.KiUserCallbackDispatcher
(002373AB) Vcl::Forms::TCustomForm::DestroyWindowHandle
(00006309) Vcl::Forms::TForm::~TForm
(00006024) TCustomScpExplorerForm::~TCustomScpExplorerForm
(0004D0EE) TScpCommanderForm::~TScpCommanderForm
(00103676) Execute
(00002658) wWinMain
(00F87E81) __wstartup
(000665F2) ntdll.dll.RtlGetAppContainerNamedObjectPath
(000665BF) ntdll.dll.RtlGetAppContainerNamedObjectPath

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 pointer operation

Stack trace:
(00417E6C) System::TObject::FreeInstance
(00417E6C) System::TObject::FreeInstance
(00417F74) System::TObject::Free
(0027AD15) Vcl::Controls::TWinControl::WndProc
(002BDFEF) Vcl::Comctrls::TCustomListView::WndProc
(003A5978) System::Classes::_18201
(0003DF59) USER32.dll
(00034EC5) USER32.dll
(000345A2) USER32.dll
(00032746) USER32.dll.CallWindowProcW
(00079E57) COMCTL32.DLL
(00079EF6) COMCTL32.DLL
(00079CAC) COMCTL32.DLL
(0003DF59) USER32.dll
(00034EC5) USER32.dll
(000345A2) USER32.dll
(00032746) USER32.dll.CallWindowProcW
(0047CCAF) Dragdrop::TDragDrop::WndMethod
(003A5978) System::Classes::_18201
(0003DF59) USER32.dll
(00034EC5) USER32.dll
(00034AC5) USER32.dll
(0003868D) USER32.dll
(0007405B) ntdll.dll.KiUserCallbackDispatcher
(0023745F) Vcl::Forms::TCustomForm::DestroyWindowHandle
(00006309) Vcl::Forms::TForm::~TForm
(00006024) TCustomScpExplorerForm::~TCustomScpExplorerForm
(0004D0EE) TScpCommanderForm::~TScpCommanderForm
(0010372D) Execute
(00002658) wWinMain
(00F8814D) __wstartup
(00066C7C) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066C49) ntdll.dll.RtlGetAppContainerNamedObjectPath

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.