@martin.jakob: Thanks for your report. I've sent you the debug version.

Hi,

I guess I have the same problem on Windows Server 2019 using WinSCP 6.5.5. Every couple of days, a few of our uploads fail with the error message: "WinSCP process terminated with exit code 3."
I usually works again the next time without a reboot being necessary.
I've attached a log file, I anonymized the SFTP server address in it.
Could you maybe send me the debug version?

I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.

I cannot say for sure, it varies. Last time, the problem appeared 3-4 days after the server reboot, with approximately 200 sessions initiated daily

I'm sorry, but I have no clue. How many sessions does it take for the problem to appear?

Hi, everyone!

Been running the .NET version for years. Recently though we have been getting the following error:

WinSCP process terminated with exit code 3. There was no output. Response log file C:\Windows\TEMP\wscp1688.019FD045.tmp was not created. This could indicate lack of write permissions to the log folder or problems starting WinSCP itself.
There is no log created, and even when I enable logging this error does not log.

A reboot solves it for 3-4 days, but it comes back every time. Once it hits, then any further communication is dead...and everything continues to fail until a reboot.

I am using 6.3.2 version WinSCP
There are no stale processes WinSCP in the Task Manager.

I am attaching the log file

Do you have any idea what could be causing this?
Thanks