Currently, there's no way to prevent the file transfer progress to be printed in scripting.
If you want to filter it, you have to filter it yourself in your batch file.
Or use WinSCP .NET assembly, instead of scripting.

I am running a batch script which calls a WinSCP script via command line. The script file has get command. When I run the script, say backup.bat, it executes and while downloading the file I can see these lines for every file:
I don't want the WinSCP script to propagate everything going on in the script. I tried but it didn't work either. I only want to echo things that I wrote echo "message" in the script explicitly. I don't want to send null like this either
What can I do?