Invalid access to memory - TTerminalManager::Idle

<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:
Invalid access to memory.

Stack trace:
(000990AA) TTerminalManager::Idle
(008BCA5A) C5104_0
(008BEAC2) ____ExceptionHandler
(008BB87C) __ExceptionHandler
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(000175BF) TCustomScpExplorerForm::Idle
(0003EDF7) TNonVisualDataModule::DoIdle
(0003EDB4) TNonVisualDataModule::SessionIdleTimerTimer
(00380370) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

(007B45B8) TTerminal::GetActive
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(0009912B) TTerminalManager::Idle
(000175BF) TCustomScpExplorerForm::Idle
(0003EDF7) TNonVisualDataModule::DoIdle
(0003EDB4) TNonVisualDataModule::SessionIdleTimerTimer
(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.

If I zip a file and it's not complete, I can get this error if I try to go to another directory.

WinSCP 5.13.4

Error message:
Invalid access to memory.

Stack trace:
(00099916) TTerminalManager::Idle
(008BDC8E) C5104_3
(008BFCF6) ____ExceptionHandler
(008BCAB0) __ExceptionHandler
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(000175BF) TCustomScpExplorerForm::Idle
(0003EDF7) TNonVisualDataModule::DoIdle
(0003EDB4) TNonVisualDataModule::SessionIdleTimerTimer
(00380D20) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) USER32.dll.DispatchMessageW

(007B574C) TTerminal::GetActive
(0006248E) ntdll.dll
(0000F15E) ntdll.dll.KiUserExceptionDispatcher
(00099997) TTerminalManager::Idle
(000175BF) TCustomScpExplorerForm::Idle
(0003EDF7) TNonVisualDataModule::DoIdle
(0003EDB4) TNonVisualDataModule::SessionIdleTimerTimer
(00380D20) System::Classes::_18201
(000152F7) USER32.dll
(00015D35) USER32.dll
(000167BF) USER32.dll
(00016885) 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 5.21.1

Error message:
Acceso a memoria no válido

Traza de la pila:
(000B5C19) TTerminalManager::Idle
(00FD0EE2) C5412_3
(00FD2F4A) ____ExceptionHandler
(00FCFD04) __ExceptionHandler
(0008786F) ntdll.dll
(00073EE1) ntdll.dll.KiUserExceptionDispatcher
(00019526) TCustomScpExplorerForm::Idle
(0004CE77) TNonVisualDataModule::DoIdle
(0004CE34) TNonVisualDataModule::SessionIdleTimerTimer
(003C85A0) System::Classes::_18201
(000401F9) USER32.dll
(000371C5) USER32.dll
(00034F25) USER32.dll
(00034CEB) USER32.dll.DispatchMessageW

(00DCB11C) TTerminal::GetActive
(0008786F) ntdll.dll
(00073EE1) ntdll.dll.KiUserExceptionDispatcher
(000B5C98) TTerminalManager::Idle
(00019526) TCustomScpExplorerForm::Idle
(0004CE77) TNonVisualDataModule::DoIdle
(0004CE34) TNonVisualDataModule::SessionIdleTimerTimer
(003C85A0) System::Classes::_18201
(000401F9) USER32.dll
(000371C5) USER32.dll
(00034F25) USER32.dll
(00034CEB) 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 5.21.7

Error message:
Invalid access to memory.

Stack trace:
(000B6ECD) TTerminalManager::Idle
(00FDF7C2) C5412_0
(00FE182A) ____ExceptionHandler
(00FDE5E4) __ExceptionHandler
(00087ACF) ntdll.dll
(00073FA1) ntdll.dll.KiUserExceptionDispatcher
(0001A0A2) TCustomScpExplorerForm::Idle
(0004DDFF) TNonVisualDataModule::DoIdle
(0004DDBC) TNonVisualDataModule::SessionIdleTimerTimer
(003C9C40) System::Classes::_18201
(00040379) USER32.dll
(00037345) USER32.dll
(000350B5) USER32.dll
(00034E7B) USER32.dll.DispatchMessageW

(00DD6C20) TTerminal::GetActive
(00087ACF) ntdll.dll
(00073FA1) ntdll.dll.KiUserExceptionDispatcher
(000B6F4C) TTerminalManager::Idle
(0001A0A2) TCustomScpExplorerForm::Idle
(0004DDFF) TNonVisualDataModule::DoIdle
(0004DDBC) TNonVisualDataModule::SessionIdleTimerTimer
(003C9C40) System::Classes::_18201
(00040379) USER32.dll
(00037345) USER32.dll
(000350B5) USER32.dll
(00034E7B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.