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 tried to open a session to connect another host from my host when I find this error,
Invalid access to memory
tack trace:
(00089B70)
(01003DEA) C6083_0
(01005E52) ____ExceptionHandler
(01002C0C) __ExceptionHandler
(0008239F) ntdll.dll
(0006FEFA) ntdll.dll.KiUserExceptionDispatcher
(00C85C7A) _plug_closing_winsock_error
(00C6B42C) _ssh_conn_processed_data
(00C188BE) C3223_0
(00C189B1) _run_toplevel_callbacks
(00D6BCD7) TSecureShell::EventSelectLoop
(00D6AF43) TSecureShell::WaitForData
(00D65ADD) TSecureShell::Init
(00D6541C) TSecureShell::Open
(00DF6B41) TTerminal::Open
(00D20A03) TTerminalThread::TerminalOpenEvent
(00D1B80C) TSignalThread::Execute
(000CE0EF) Userinterface::C20_0
(000152C2) KERNEL32.DLL.BaseThreadInitThunk
(00060CA7) ntdll.dll
(00060C6F) ntdll.dll
(01004455) C6083_0
(01005A2F) _ReThrowException
(00D65BEF) TSecureShell::Init
(00D6541C) TSecureShell::Open
(00DF6B41) TTerminal::Open
(00D20A03) TTerminalThread::TerminalOpenEvent
(00D1B80C) TSignalThread::Execute
(000CE0EF) Userinterface::C20_0
(000152C2) KERNEL32.DLL.BaseThreadInitThunk
(00060CA7) ntdll.dll
(00060C6F) ntdll.dll
(01004455) C6083_0
(01005A2F) _ReThrowException
(00D65C8A) TSecureShell::Init
(00D6541C) TSecureShell::Open
(00DF6B41) TTerminal::Open
(00D20A03) TTerminalThread::TerminalOpenEvent
(00D1B80C) TSignalThread::Execute
(000CE0EF) Userinterface::C20_0
(000152C2) KERNEL32.DLL.BaseThreadInitThunk
(00060CA7) ntdll.dll
(00060C6F) ntdll.dll
(01004455) C6083_0
(01005A2F) _ReThrowException
(00D6550A) TSecureShell::Open
(00DF6B41) TTerminal::Open
(00D20A03) TTerminalThread::TerminalOpenEvent
(00D1B80C) TSignalThread::Execute
(000CE0EF) Userinterface::C20_0
(000152C2) KERNEL32.DLL.BaseThreadInitThunk
(00060CA7) ntdll.dll
(00060C6F) ntdll.dll
(01004455) C6083_0
(01005A2F) _ReThrowException
(00DF6CE9) TTerminal::Open
(00D20A03) TTerminalThread::TerminalOpenEvent
(00D1B80C) TSignalThread::Execute
(000CE0EF) Userinterface::C20_0
(000152C2) KERNEL32.DLL.BaseThreadInitThunk
(00060CA7) ntdll.dll
(00060C6F) ntdll.dll
(01004455) C6083_0
(01005A2F) _ReThrowException
(00DF7355) TTerminal::Open
(00D20A03) TTerminalThread::TerminalOpenEvent
(00D1B80C) TSignalThread::Execute
(000CE0EF) Userinterface::C20_0
(000152C2) KERNEL32.DLL.BaseThreadInitThunk
(00060CA7) ntdll.dll
(00060C6F) ntdll.dll
Please I need your help to solve this.