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:
Copying files to remote side failed.
Invalid access to memory.
Stack trace:
(0064337E)
(0089C9C2)
(0089EA2A)
(0089B7E4)
(000851DF) ntdll.dll
(00073161) ntdll.dll.KiUserExceptionDispatcher
(006434E7)
(00719C76)
(007185DB)
(006F6C5D)
(006FBA65)
(007AFAD1)
(0000E312)
(0000F11C)
(0000F1A3)
(0000F32A)
(0003823D)
(003BDDBC)
(001A4EF5)
(0037BC78)
(00031F89) USER32.dll
(0002443E) USER32.dll
(00023DCD) USER32.dll
(00023B9B) USER32.dll.DispatchMessageW
Status: unknown_rel_addr
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.