We have a handful of users at our company that can't seem to scan documents to their mapped network folders. One user will come up to the printer, put a document in the scanner, choose their folder name from the printer menu, and then click scan to scan the document and save the PDF in their folder, and it won't work. Yet another user can be standing right behind them waiting, do the same procedure once that user is finished, and the scan goes right through.
When I check the "Send" log on the printer's web interface, under the RESULT column it will say "NG" for a user that was unable to send the PDF and the END CODE column will read "#801". For users that can send the PDF fine, their RESULT column will read "OK" and their END CODE will be "OK" as well.
When I google the END CODE "#801" I found a PDF manual with all of the Canon error codes and "#801" means "Scan Error - file blocked"... not sure what that means.