Dear Maintainer,
When I start simple-scan with "All Pages From Feeder" as source (i.e. when this was the source during my last scan session) and if I want to change to use "Single Page", I always got the message "Failed to scan - Document feeder empty".
It is like simple-scan does not take into account the fact I changed the source but keep the last option from start.
I can very easily reproduce it.
Start simple-scan, change the source to "All Pages From Feeder" in the dropdown list at the right-hand side of the "Scan" button and close simple-scan.
Start simple-scan again, it should start with the option "All Pages From Feeder" as source.
Change this option choosing "Single Page" and try to scan a document clicking on the button "Scan".
You should get the message "Failed to scan - Document feeder empty".
Workaround is to select "Single Page" option, close simple-scan and re-start it.
Hope it will help.
Regards,
Jean-Marc
P.S. Thank you so much creating this program I use a lot !