Hi, Please find attached the log messages I got reproducing the problem.
First part is starting simple-scan, setting the source to "All Pages From Feeder" and closing it.
Second part is re-opening simple-scan, trying to scan and getting the error message, then changing back to "Single Page", trying again and always getting the same message "Failed to scan - Document feeder empty".
I hope this help. Regards, -- Jean-Marc
simple-scan-debug.log.gz
Description: application/gzip
OpenPGP_signature
Description: OpenPGP digital signature