FTP sender channel - check if file was processed

Dear experts,

I have a file to iDoc scenario. The file is picked from an FTP folder.

The problem is that the FTP user I have can't archive nor delete files on the FTP server.

The sender partner puts a new file on the FTP folder every night and removes the old file from the day before.

That means in the Sender Channel I set the "Processing Mode" to "Test" and the "Poll Interval (secs)" to "36000". Additionally on RWB

"Availability Time Planning" I set the sender channel available only for 20 seconds at 04:30:00am every day.

Now sometimes it happens that the sender channel is not processing any file (even though there is one).

Question: Is there a way to trigger an alert if that channel has not processed any file in the morning?

Thank you and best regards,

Peter