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.

I get this regularly with this version - I assume when the connection times out and I try to refresh later.

WinSCP 5.11.3

Error message:
Invalid access to memory.

Stack trace:
(006279BB) _log_proxy_stderr
(0089D34A) C5067_0
(0089F3B2) ____ExceptionHandler
(0089C16C) __ExceptionHandler
(00088D2F) ntdll.dll
(0006FBF1) ntdll.dll.KiUserExceptionDispatcher
(0066202A) C2503_0
(00661EC6) _handle_got_event
(0071B307) TSecureShell::EventSelectLoop
(0071A537) TSecureShell::WaitForData
(007156C9) TSecureShell::Init
(00714F9E) TSecureShell::Open
(00796C16) TTerminal::Open
(006E3013) TTerminalThread::TerminalOpenEvent
(006DE17C) TSignalThread::Execute
(000A0DD7) Userinterface::C20_0
(00017652) KERNEL32.DLL.BaseThreadInitThunk
(00063A45) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00063A12) ntdll.dll.RtlGetAppContainerNamedObjectPath

(0089D9B5) C5067_0
(0089EF8F) _ReThrowException
(007157D7) TSecureShell::Init
(00714F9E) TSecureShell::Open
(00796C16) TTerminal::Open
(006E3013) TTerminalThread::TerminalOpenEvent
(006DE17C) TSignalThread::Execute
(000A0DD7) Userinterface::C20_0
(00017652) KERNEL32.DLL.BaseThreadInitThunk
(00063A45) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00063A12) ntdll.dll.RtlGetAppContainerNamedObjectPath

(0089D9B5) C5067_0
(0089EF8F) _ReThrowException
(00715872) TSecureShell::Init
(00714F9E) TSecureShell::Open
(00796C16) TTerminal::Open
(006E3013) TTerminalThread::TerminalOpenEvent
(006DE17C) TSignalThread::Execute
(000A0DD7) Userinterface::C20_0
(00017652) KERNEL32.DLL.BaseThreadInitThunk
(00063A45) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00063A12) ntdll.dll.RtlGetAppContainerNamedObjectPath

(0089D9B5) C5067_0
(0089EF8F) _ReThrowException
(0071508C) TSecureShell::Open
(00796C16) TTerminal::Open
(006E3013) TTerminalThread::TerminalOpenEvent
(006DE17C) TSignalThread::Execute
(000A0DD7) Userinterface::C20_0
(00017652) KERNEL32.DLL.BaseThreadInitThunk
(00063A45) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00063A12) ntdll.dll.RtlGetAppContainerNamedObjectPath

(0089D9B5) C5067_0
(0089EF8F) _ReThrowException
(00796DAB) TTerminal::Open
(006E3013) TTerminalThread::TerminalOpenEvent
(006DE17C) TSignalThread::Execute
(000A0DD7) Userinterface::C20_0
(00017652) KERNEL32.DLL.BaseThreadInitThunk
(00063A45) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00063A12) ntdll.dll.RtlGetAppContainerNamedObjectPath

(0089D9B5) C5067_0
(0089EF8F) _ReThrowException
(00797309) TTerminal::Open
(006E3013) TTerminalThread::TerminalOpenEvent
(006DE17C) TSignalThread::Execute
(000A0DD7) Userinterface::C20_0
(00017652) KERNEL32.DLL.BaseThreadInitThunk
(00063A45) ntdll.dll.RtlGetAppContainerNamedObjectPath
(00063A12) 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.

<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 access to memory.

Stack trace:
(006279BB) _log_proxy_stderr
(0089D34A) C5067_0
(0089F3B2) ____ExceptionHandler
(0089C16C) __ExceptionHandler
(000851DF) ntdll.dll
(00073161) ntdll.dll.KiUserExceptionDispatcher
(0066202A) C2503_0
(00661EC6) _handle_got_event
(0071B307) TSecureShell::EventSelectLoop
(0071B84D) TSecureShell::Idle
(00795DEB) TTerminal::Idle
(00096CA0) TTerminalManager::Idle
(00017207) TCustomScpExplorerForm::Idle
(0003DCDF) TNonVisualDataModule::DoIdle
(0003DC9C) TNonVisualDataModule::SessionIdleTimerTimer
(0037BCBC) System::Classes::_18201
(00031F89) USER32.dll
(0002443E) USER32.dll
(00023DCD) USER32.dll
(00023B9B) USER32.dll.DispatchMessageW

(0089D9B5) C5067_0
(0089EF8F) _ReThrowException
(00096CE5) TTerminalManager::Idle
(00017207) TCustomScpExplorerForm::Idle
(0003DCDF) TNonVisualDataModule::DoIdle
(0003DC9C) TNonVisualDataModule::SessionIdleTimerTimer
(0037BCBC) System::Classes::_18201
(00031F89) USER32.dll
(0002443E) USER32.dll
(00023DCD) USER32.dll
(00023B9B) USER32.dll.DispatchMessageW

The problem happens rarely. I cannot reproduce it.

martin wrote:

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.

I was sent a report by email.
The problem occurs when winscp tries to reconnect after connection was broken: Notebook went into sleep mode, and was woken up in another wifi network.

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 5.11.2

Error message:
Ошибка доступа к памяти.

Трассировка стека:
(00627407) _log_proxy_stderr
(0089C9C2) C5067_3
(0089EA2A) ____ExceptionHandler
(0089B7E4) __ExceptionHandler
(00062496) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(00661A76) C2503_0
(00661912) _handle_got_event
(0071AD03) TSecureShell::EventSelectLoop
(00719F33) TSecureShell::WaitForData
(007150C5) TSecureShell::Init
(0071499A) TSecureShell::Open
(00759E5F) TSFTPFileSystem::Open
(007981FF) TTerminal::Reopen
(006E2A69) TTerminalThread::TerminalReopenEvent
(006DDBC4) TSignalThread::Execute
(000A0D93) Userinterface::C20_0
(00012368) kernel32.dll.BaseThreadInitThunk
(000388F0) ntdll.dll
(000388C0) ntdll.dll

(0089D02D) C5067_3
(0089E607) _ReThrowException
(007151D3) TSecureShell::Init
(0071499A) TSecureShell::Open
(00759E5F) TSFTPFileSystem::Open
(007981FF) TTerminal::Reopen
(006E2A69) TTerminalThread::TerminalReopenEvent
(006DDBC4) TSignalThread::Execute
(000A0D93) Userinterface::C20_0
(00012368) kernel32.dll.BaseThreadInitThunk
(000388F0) ntdll.dll
(000388C0) ntdll.dll

(0089D02D) C5067_3
(0089E607) _ReThrowException
(0071526E) TSecureShell::Init
(0071499A) TSecureShell::Open
(00759E5F) TSFTPFileSystem::Open
(007981FF) TTerminal::Reopen
(006E2A69) TTerminalThread::TerminalReopenEvent
(006DDBC4)%

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 5.9.5

Error message:
Invalid access to memory.

Stack trace:
(0060F5DF) _log_proxy_stderr
(0086700E) C5073_3
(00869076) ____ExceptionHandler
(00865E30) __ExceptionHandler
(00081D3F) ntdll.dll
(0006F8EA) ntdll.dll.KiUserExceptionDispatcher
(00649916) C2501_0
(006497BA) _handle_got_event
(006FF523) TSecureShell::EventSelectLoop
(006FFA69) TSecureShell::Idle
(0076F72F) TTerminal::Idle
(0008EEF0) TTerminalManager::Idle
(00016C9F) TCustomScpExplorerForm::Idle
(0003D057) TNonVisualDataModule::DoIdle
(0003D014) TNonVisualDataModule::SessionIdleTimerTimer
(0037326C) System::Classes::_18201
(0002C2B1) USER32.dll
(0000D885) USER32.dll
(0000D1DF) USER32.dll
(0000CF9B) USER32.dll.DispatchMessageW

(00867679) C5073_3
(00868C53) _ReThrowException
(0008EF35) TTerminalManager::Idle
(00016C9F) TCustomScpExplorerForm::Idle
(0003D057) TNonVisualDataModule::DoIdle
(0003D014) TNonVisualDataModule::SessionIdleTimerTimer
(0037326C) 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)>

The problem occurs when winscp tries to reconnect after connection was broken: Internet connection lost or when notebook went into sleep mode and was woken up.

Closing program an starting new instance helps, of course, but this procedure involves closing all the files which were opened at the moment.

PS I do not really wish to be contacted by the WinSCP team to help resolving the problem. It's just for you to know, in case it can be helpful

WinSCP 5.9.5

Error message:
Invalid access to memory.

Stack trace:
(0060F5DF) _log_proxy_stderr
(0086700E) C5073_3
(00869076) ____ExceptionHandler
(00865E30) __ExceptionHandler
(00081D3F) ntdll.dll
(0006F8EA) ntdll.dll.KiUserExceptionDispatcher
(00649916) C2501_0
(006497BA) _handle_got_event
(006FF523) TSecureShell::EventSelectLoop
(006FE75B) TSecureShell::WaitForData
(006F9B65) TSecureShell::Init
(006F943A) TSecureShell::Open
(0077055A) TTerminal::Open
(006C91FF) TTerminalThread::TerminalOpenEvent
(006C41D4) TSignalThread::Execute
(00098BA3) Userinterface::C20_0
(000152C2) KERNEL32.DLL.BaseThreadInitThunk
(0005FFD7) ntdll.dll
(0005FF9F) ntdll.dll

(00867679) C5073_3
(00868C53) _ReThrowException
(006F9C73) TSecureShell::Init
(006F943A) TSecureShell::Open
(0077055A) TTerminal::Open
(006C91FF) TTerminalThread::TerminalOpenEvent
(006C41D4) TSignalThread::Execute
(00098BA3) Userinterface::C20_0
(000152C2) KERNEL32.DLL.BaseThreadInitThunk
(0005FFD7) ntdll.dll
(0005FF9F) ntdll.dll

(00867679) C5073_3
(00868C53) _ReThrowException
(006F9D0E) TSecureShell::Init
(006F943A) TSecureShell::Open
(0077055A) TTerminal::Open
(006C91FF) TTerminalThread::TerminalOpenEvent
(006C41D4) TSignalThread::Execute
(00098BA3) Userinterface::C20_0
(000152C2) KERNEL32.DLL.BaseThreadInitThunk
(0005FFD7) ntdll.dll
(0005FF9F) ntdll.dll

(00867679) C5073_3
(00868C53) _ReThrowException
(006F9528) TSecureShell::Open
(0077055A) TTer