I do not think this has anything to do with WinSCP. It's your batch file syntax that is wrong. There's no if ERRORLEVEL EQ 1. It should be:

(though better is GEQ)
or

See links in How do I know that script completed successfully?
and https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/if

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Also you should use winscp.com and not winscp.exe.

I don't know why but extracting the line into a separate line fixed the problem. Is the same if I use %ERRORLEVEL%

Hi,

I generate the following script from external program:

It is called with the following batch which is also generated from external program:

Both script and batch are working fine. To evaluate exception handling with the error file, I specified wrong server path on purpose in the WinSCP script. As expected, I get the following exception in my log:

(Exception) **Expected host key was not configured, use -hostkey switch.**

However, no error file is created. I've also used different approaches to try to create error file. As they have worked in the past, I am pretty sure it is not about my script but about how WinSCP throws the Errorlevel. It seems like WinSCP doesn't return Errorlevel=1. Can you tell me why is that?