Invalid access to memory - System::TObject::Free

Was connected to a server doing updates. The session timed out. I clicked reconnect and this happend


WinSCP 5.13.3

Error message:
Invalid access to memory.

Stack trace:
(003F09F8) System::TObject::Free
(008BCA5A) C5104_0
(008BEAC2) ____ExceptionHandler
(008BB87C) __ExceptionHandler
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(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)

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:
Acceso a memoria no válido

Traza de la pila:
(003F13A8) System::TObject::Free
(008BDC8E) C5104_3
(008BFCF6) ____ExceptionHandler
(008BCAB0) __ExceptionHandler
(0007DA8F) ntdll.dll
(0006B6B1) ntdll.dll.KiUserExceptionDispatcher
(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

(007BAAE5) TTerminal::TranslateLockedPath
(0007DA8F) ntdll.dll
(0006B6B1) ntdll.dll.KiUserExceptionDispatcher
(007BB288) TTerminal::PeekCurrentDirectory
(0001AC21) TCustomScpExplorerForm::UpdateSessionData
(000426F7) TScpCommanderForm::UpdateSessionData
(0001ABD9) TCustomScpExplorerForm::UpdateTerminal
(0004265F) TScpCommanderForm::UpdateTerminal
(00005E00) TCustomScpExplorerForm::TerminalChanging
(000967CB) TTerminalManager::DoSetActiveTerminal
(00096756) TTerminalManager::SetActiveTerminal
(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

(003F24CC) System::HandleAnyException
(0007DA8F) ntdll.dll
(0006B6B1) ntdll.dll.KiUserExceptionDispatcher
(00380D20) System::Classes::_18201
(0003AE69) USER32.dll
(00037335) USER32.dll
(00036BE9) USER32.dll
(000369CB) 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.

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 5.15.4

Error message:
メモリのアクセス違反

スタック トレース:
(0041641C) System::TObject::Free
(00928272) C5157_3
(0092A2DA) ____ExceptionHandler
(00927094) __ExceptionHandler
(00087D6F) ntdll.dll
(00073211) ntdll.dll.KiUserExceptionDispatcher
(0003C645) TNonVisualDataModule::~TNonVisualDataModule
(00101D59) Execute
(00002664) wWinMain
(009262A9) C5025_0
(00066B72) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066B3F) 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 5.15.9

Error message:
メモリのアクセス違反

スタック トレース:
(00416470) System::TObject::Free
(0092812A) C5157_3
(0092A192) ____ExceptionHandler
(00926F4C) __ExceptionHandler
(00087D6F) ntdll.dll
(00073211) ntdll.dll.KiUserExceptionDispatcher
(0003C661) TNonVisualDataModule::~TNonVisualDataModule
(00101DAD) Execute
(00002664) wWinMain
(00926161) C5025_0
(00066B72) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066B3F) 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 5.15.9

Error message:
メモリのアクセス違反

スタック トレース:
(0041646E) System::TObject::Free
(0092812A) C5157_3
(0092A192) ____ExceptionHandler
(00926F4C) __ExceptionHandler
(00087D6F) ntdll.dll
(00073211) ntdll.dll.KiUserExceptionDispatcher
(0001FC81) TCustomScpExplorerForm::NeedSession
(0001FC26) TCustomScpExplorerForm::LastTerminalClosed
(000ABB3E) TTerminalManager::SetActiveTerminal
(000AAF7F) TTerminalManager::FreeActiveTerminal
(00279219) Vcl::Controls::TWinControl::WndProc
(00278860) Vcl::Controls::TWinControl::MainWndProc
(003A3E7C) System::Classes::_18201
(00043389) USER32.dll
(00023F87) USER32.dll
(000234DA) USER32.dll.CallWindowProcW
(0047AD1B) Dragdrop::TDragDrop::WndMethod
(003A3E7C) System::Classes::_18201
(00043389) USER32.dll
(00023F87) USER32.dll
(000230D9) USER32.dll
(00022EBB) USER32.dll.DispatchMessageW

(0041646E) System::TObject::Free
(00087D6F) ntdll.dll
(00073211) ntdll.dll.KiUserExceptionDispatcher
(0001FC81) TCustomScpExplorerForm::NeedSession
(0001FC26) TCustomScpExplorerForm::LastTerminalClosed
(000ABB3E) TTerminalManager::SetActiveTerminal
(000AAF7F) TTerminalManager::FreeActiveTerminal
(00279219) Vcl::Controls::TWinControl::WndProc
(00278860) Vcl::Controls::TWinControl::MainWndProc
(003A3E7C) System::Classes::_18201
(00043389) USER32.dll
(00023F87) USER32.dll
(000234DA) USER32.dll.CallWindowProcW
(0047AD1B) Dragdrop::TDragDrop::WndMethod
(003A3E7C) System::Classes::_18201
(00043389) USER32.dll
(00023F87) USER32.dll
(000230D9) USER32.dll
(00022EBB) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

I was trying to rename a file in the remote directory.

WinSCP 5.17.8

Error message:
Invalid access to memory.

Stack trace:
(00417EC0) System::TObject::Free
(00F89E6E) C5296_0
(00F8BED6) ____ExceptionHandler
(00F88C90) __ExceptionHandler
(0008422F) ntdll.dll
(00071B31) ntdll.dll.KiUserExceptionDispatcher
(001035FE) Execute
(00002658) wWinMain
(00F87E81) __wstartup
(000656EB) ntdll.dll.RtlGetAppContainerNamedObjectPath
(000656B8) ntdll.dll.RtlGetAppContainerNamedObjectPath

The problem happens rarely. I cannot reproduce it.

It happens after resuming closed remote access (RDP protocol) session.
WinSCP 6.4

Error message:
Invalid access to memory.

Stack trace:
(002B9C14) System::TObject::Free
(00087F7F) ntdll.dll
(00074501) ntdll.dll.KiUserExceptionDispatcher
(0041CE19) Vcl::Controls::TWinControl::WndProc
(0046010F) Vcl::Comctrls::TCustomListView::WndProc
(0023A4A8) System::Classes::_18201
(000406A9) USER32.dll
(00036E15) USER32.dll
(000365D1) USER32.dll.GetSystemMetricsForDpi
(00034DF6) USER32.dll.CallWindowProcW
(00079E97) COMCTL32.DLL
(00079F36) COMCTL32.DLL
(00079CEC) COMCTL32.DLL
(000406A9) USER32.dll
(00036E15) USER32.dll
(00036A15) USER32.dll
(0003AEED) USER32.dll
(000744BB) ntdll.dll.KiUserCallbackDispatcher
(0041BDC1) Vcl::Controls::TWinControl::DestroyWnd
(0049F806) Customdirview::TCustomDirView::DestroyWnd
(00484725) Ielistview::TCustomIEListView::CMRecreateWnd
(0041CE19) Vcl::Controls::TWinControl::WndProc
(0046010F) Vcl::Comctrls::TCustomListView::WndProc

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.

@eram.artinian: 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 6.3.4

Error message:
Invalid access to memory.

Stack trace:
(002A5DE8) System::TObject::Free
(0008591F) ntdll.dll
(00072ED1) ntdll.dll.KiUserExceptionDispatcher
(00408FE1) Vcl::Controls::TWinControl::WndProc
(0044C2D7) Vcl::Comctrls::TCustomListView::WndProc
(00226F2C) System::Classes::_18201
(00044E09) USER32.dll
(000358C7) USER32.dll
(00034E1A) USER32.dll.CallWindowProcW
(00074FAF) COMCTL32.DLL
(0007504E) COMCTL32.DLL
(00074D4C) COMCTL32.DLL
(00044E09) USER32.dll
(000358C7) USER32.dll
(00034E1A) USER32.dll.CallWindowProcW
(004C2CEB) Dragdrop::TDragDrop::WndMethod
(00226F2C) System::Classes::_18201
(00044E09) USER32.dll
(000358C7) USER32.dll
(00035465) USER32.dll
(0004227D) USER32.dll
(00072E8B) ntdll.dll.KiUserCallbackDispatcher
(003C586B) Vcl::Forms::TCustomForm::DestroyWindowHandle
(00007961) Vcl::Forms::TForm::~TForm
(0000767C) TCustomScpExplorerForm::~TCustomScpExplorerForm
(00058646) TScpCommanderForm::~TScpCommanderForm
(0011C16E) Execute
(000031E3) wWinMain
(00E20B11) C6481_0
(00066C5B) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00066C28) ntdll.dll.RtlGetAppContainerNamedObjectPath

The problem happens rarely. I cannot reproduce it.