<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
Happened during an overnight extremely large file transfer from unix server over VPN to hard drive. Has not happened previously. No one was here, so no keys pressed. However, VPN disconnected and this was shown on the prompt to reconnect (again, VPN disconnects have happened before without this issue).
<If relevant, consider attaching a session log file or a screenshot)>
WinSCP 5.11.1
Error message:
Invalid access to memory.
Stack trace:
(0066240D) C2507_0
(0089C862) C5067_0
(0089E8CA) ____ExceptionHandler
(0089B684) __ExceptionHandler
(000624F6) ntdll.dll
(0000F13E) ntdll.dll.KiUserExceptionDispatcher
(0065F716) _count234
(0065FC1B) _add234
(00663CA9) _sk_addr_dup
(00663DA9) _putty_sk_new
(0062F605) _new_connection
(006357D3) _ssh_connshare_log
(0064226D) _sshfwd_x11_is_local
(00714777) TSecureShell::Open
(00759D0B) TSFTPFileSystem::Open
(007980AB) TTerminal::Reopen
(006E2915) TTerminalThread::TerminalReopenEvent
(006DDA70) TSignalThread::Execute
(000A0CE3) Userinterface::C20_0
(00012368) kernel32.dll.BaseThreadInitThunk
(00038900) ntdll.dll
(000388D0) ntdll.dll
(0089CECD) C5067_0
(0089E4A7) _ReThrowException
(00714934) TSecureShell::Open
(00759D0B) TSFTPFileSystem::Open
(007980AB) TTerminal::Reopen
(006E2915) TTerminalThread::TerminalReopenEvent
(006DDA70) TSignalThread::Execute
(000A0CE3) Userinterface::C20_0
(00012368) kernel32.dll.BaseThreadInitThunk
(00038900) ntdll.dll
(000388D0) ntdll.dll
(0089CECD) C5067_0
(0089E4A7) _ReThrowException
(0079696D) TTerminal::Open
(007980AB) TTerminal::Reopen
(006E2915) TTerminalThread::TerminalReopenEvent
(006DDA70) TSignalThread::Execute
(000A0CE3) Userinterface::C20_0
(00012368) kernel32.dll.BaseThreadInitThunk
(00038900) ntdll.dll
(000388D0) ntdll.dll
The problem happens rarely. I cannot reproduce it.