How to determine if WinSCP actually downloaded files vs no files matching 'mask' found

I am running an automatic script triggered by a scheduling program called System Scheduler

I am attaching my batch file and script.

The program runs every 20 minutes for a couple of hours. Most of the time it will not find any files to download.
When that happens I get a return code of 0 with the message: no files matching 'mask' found.

I need to determine if files were found and successfully downloaded but I can't figure out
1. How to determine if files were found
2. How I should code getting the information
3. Where to put the code

so that my batch file will send me an email if files are actually downloaded.

Can you help?

There's option failonnomatch for this purpose:
https://winscp.net/eng/docs/scriptcommand_option#failonnomatch

Perfect.

Thank you.