Are you using the latest version of WinSCP?
This looks like an old bug:
https://winscp.net/tracker/996

See also
https://winscp.net/eng/docs/message_library_process_terminated_with_exit_code_3

Hi Martin,

We are facing this issue that files are not uploaded and downloaded until server re-start is done.

In logs we are getting below error :

Error: WinSCP.SessionLocalException: WinSCP process terminated with exit code 3. There was no output. Response log file C:\Windows\TEMP\wscp055C.0350F1F9.tmp was not created. This could indicate lack of write permissions to the log folder or problems starting WinSCP itself.


Please help.