Invalid access to memory - TScpCommanderForm::TerminalChanged

<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 5.8.2

Error message:
Invalid access to memory.

Stack trace:
(0003E423) TScpCommanderForm::TerminalChanged
(0084095E) C5073_3
(008429C6) ____ExceptionHandler
(0083F940) __ExceptionHandler
(000623AA) ntdll.dll
(0000F12E) ntdll.dll.KiUserExceptionDispatcher
(000054D8) TCustomScpExplorerForm::SetTerminal
(00089EB1) TTerminalManager::TerminalReady
(00086FC8) TTerminalManager::ConnectActiveTerminal
(000878A0) TTerminalManager::DoSetActiveTerminal
(000875EE) TTerminalManager::SetActiveTerminal
(0001A8E7) TCustomScpExplorerForm::NeedSession
(00021B6C) TCustomScpExplorerForm::CMShowingChanged
(00021A88) TCustomScpExplorerForm::Dispatch
(00236A39) Vcl::Controls::TWinControl::WndProc
(001F0EE8) Vcl::Forms::TCustomForm::WndProc
(007E6C31) Vclcommon::C2754_0
(00231B30) Vcl::Controls::TControl::Perform
(00235E29) Vcl::Controls::TWinControl::UpdateShowing
(00235F38) Vcl::Controls::TWinControl::UpdateControlState
(00238ADE) Vcl::Controls::TWinControl::CMVisibleChanged
(00236A39) Vcl::Controls::TWinControl::WndProc
(001F0EE8) Vcl::Forms::TCustomForm::WndProc
(007E6D58) Vclcommon::C2754_0
(00231B30) Vcl::Controls::TControl::Perform
(002304BE) Vcl::Controls::TControl::SetVisible
(000C1C6C) Execute
(000024A8) wWinMain
(0083EB55) C4941_0
(000387F0) ntdll.dll
(000387C0) 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 5.9.5

Error message:
Invalid access to memory.

Stack trace:
(0004126F) TScpCommanderForm::TerminalChanged
(0086700E) C5073_3
(00869076) ____ExceptionHandler
(00865E30) __ExceptionHandler
(000624F6) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(00005AC0) TCustomScpExplorerForm::SetTerminal
(0008E4F9) TTerminalManager::TerminalReady
(0008B60C) TTerminalManager::ConnectActiveTerminal
(0008BEBD) TTerminalManager::DoSetActiveTerminal
(0008BC1A) TTerminalManager::SetActiveTerminal
(0001BA3B) TCustomScpExplorerForm::NeedSession
(00022E38) TCustomScpExplorerForm::CMShowingChanged
(00022CE7) TCustomScpExplorerForm::Dispatch
(0024F2A9) Vcl::Controls::TWinControl::WndProc
(00209758) Vcl::Forms::TCustomForm::WndProc
(0080C6D1) Vclcommon::C2754_0
(0024A3A0) Vcl::Controls::TControl::Perform
(0024E699) Vcl::Controls::TWinControl::UpdateShowing
(0024E7A8) Vcl::Controls::TWinControl::UpdateControlState
(0025134E) Vcl::Controls::TWinControl::CMVisibleChanged
(0024F2A9) Vcl::Controls::TWinControl::WndProc
(00209758) Vcl::Forms::TCustomForm::WndProc
(0080C7F8) Vclcommon::C2754_0
(0024A3A0) Vcl::Controls::TControl::Perform
(00248D2E) Vcl::Controls::TControl::SetVisible
(000D7CCB) Execute
(000024A8) wWinMain
(00865045) C4941_0
(00038900) ntdll.dll
(000388D0) ntdll.dll

The problem happens rarely. I cannot reproduce it.

Trying to read a folder with 200,000+ files.

WinSCP 5.13.1

Error message:
Invalid access to memory.

Stack trace:
(000421DB) TScpCommanderForm::TerminalChanged
(008BA3F6) C5101_0
(008BC45E) ____ExceptionHandler
(008B9218) __ExceptionHandler
(00085B2F) ntdll.dll
(00073A61) ntdll.dll.KiUserExceptionDispatcher
(00005D14) TCustomScpExplorerForm::SetTerminal
(0009732D) TTerminalManager::TerminalReady
(00094570) TTerminalManager::ConnectActiveTerminal
(00094DF4) TTerminalManager::DoSetActiveTerminal
(00094B7E) TTerminalManager::SetActiveTerminal
(0001C221) TCustomScpExplorerForm::NeedSession
(00023670) TCustomScpExplorerForm::CMShowingChanged
(000234DA) TCustomScpExplorerForm::Dispatch
(00259A15) Vcl::Controls::TWinControl::WndProc
(00213EDC) Vcl::Forms::TCustomForm::WndProc
(00858868) Vclcommon::C2785_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 5.13.8

Error message:
Invalid access to memory.

Stack trace:
(00043173) TScpCommanderForm::TerminalChanged
(008BF99A) C5105_3
(008C1A02) ____ExceptionHandler
(008BE7BC) __ExceptionHandler
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(00005DDA) TCustomScpExplorerForm::DoSetTerminal
(00005D8A) TCustomScpExplorerForm::SetTerminal
(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
(0085DCD0) Vclcommon::C2790_0

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 5.13.5

Error message:
Invalid access to memory.

Stack trace:
(00043147) TScpCommanderForm::TerminalChanged
(008BED3E) C5105_0
(008C0DA6) ____ExceptionHandler
(008BDB60) __ExceptionHandler
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(00005DBE) TCustomScpExplorerForm::DoSetTerminal
(00005D6E) TCustomScpExplorerForm::SetTerminal
(00096250) TTerminalManager::ConnectActiveTerminal
(00096AD4) TTerminalManager::DoSetActiveTerminal
(0009685E) TTerminalManager::SetActiveTerminal
(0001C3AD) TCustomScpExplorerForm::NeedSession
(00023F30) TCustomScpExplorerForm::CMShowingChanged
(00023D9A) TCustomScpExplorerForm::Dispatch
(0025BB95) Vcl::Controls::TWinControl::WndProc
(0021605C) Vcl::Forms::TCustomForm::WndProc
(0085D10C) Vclcommon::C2790_0

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 5.13.9

Error message:
Invalid access to memory.

Stack trace:
(00043173) TScpCommanderForm::TerminalChanged
(008BFA86) C5105_3
(008C1AEE) ____ExceptionHandler
(008BE8A8) __ExceptionHandler
(0008402F) ntdll.dll
(00071931) ntdll.dll.KiUserExceptionDispatcher
(00005DDA) TCustomScpExplorerForm::DoSetTerminal
(00005D8A) TCustomScpExplorerForm::SetTerminal
(000963F8) TTerminalManager::ConnectActiveTerminal
(00096C7C) TTerminalManager::DoSetActiveTerminal
(00096A06) TTerminalManager::SetActiveTerminal
(0001C3C9) TCustomScpExplorerForm::NeedSession
(0001C36E) TCustomScpExplorerForm::LastTerminalClosed
(00096A06) TTerminalManager::SetActiveTerminal
(00095F37) TTerminalManager::FreeActiveTerminal
(000963F8) TTerminalManager::ConnectActiveTerminal
(00096C7C) TTerminalManager::DoSetActiveTerminal
(00096A06) TTerminalManager::SetActiveTerminal
(0001C3C9) TCustomScpExplorerForm::NeedSession
(00023F5C) TCustomScpExplorerForm::CMShowingChanged
(00023DC6) TCustomScpExplorerForm::Dispatch
(0025BDED) Vcl::Controls::TWinControl::WndProc
(002162B4) Vcl::Forms::TCustomForm::WndProc
(0085DDBC) 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 5.17.7

Error message:
Acesso inválido à memória

Rastreamento de pilha:
(0004E473) TScpCommanderForm::TerminalChanged
(000861AF) ntdll.dll
(00072B31) ntdll.dll.KiUserExceptionDispatcher
(00006F7E) TCustomScpExplorerForm::DoSetTerminal
(00006F2E) TCustomScpExplorerForm::SetTerminal
(000AC486) TTerminalManager::SetActiveTerminal
(000AB827) TTerminalManager::FreeActiveTerminal
(00279F45) Vcl::Controls::TWinControl::WndProc
(0027958C) Vcl::Controls::TWinControl::MainWndProc
(003A4BA8) System::Classes::_18201
(0003DD09) USER32.dll
(00034C95) USER32.dll
(00034372) USER32.dll
(00032516) USER32.dll.CallWindowProcW
(0047BF0F) Dragdrop::TDragDrop::WndMethod
(003A4BA8) System::Classes::_18201
(0003DD09) USER32.dll
(00034C95) USER32.dll
(00032A05) USER32.dll
(000327CB) 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 5.17.7

Error message:
Acesso inválido à memória

Rastreamento de pilha:
(0004E473) TScpCommanderForm::TerminalChanged
(000861AF) ntdll.dll
(00072B31) ntdll.dll.KiUserExceptionDispatcher
(00006F7E) TCustomScpExplorerForm::DoSetTerminal
(00006F2E) TCustomScpExplorerForm::SetTerminal
(000AC486) TTerminalManager::SetActiveTerminal
(000AB827) TTerminalManager::FreeActiveTerminal
(00279F45) Vcl::Controls::TWinControl::WndProc
(0027958C) Vcl::Controls::TWinControl::MainWndProc
(003A4BA8) System::Classes::_18201
(0003DD09) USER32.dll
(00034C95) USER32.dll
(00034372) USER32.dll
(00032516) USER32.dll.CallWindowProcW
(0047BF0F) Dragdrop::TDragDrop::WndMethod
(003A4BA8) System::Classes::_18201
(0003DD09) USER32.dll
(00034C95) USER32.dll
(00032A05) USER32.dll
(000327CB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.