[Zubersoft]

It definitely seems strange that a backslash is being used there. If you go into the song editor, long press the song and look at the file path there, does it show up in the same way? What about if you look at one of the scores that loads properly? One thing we can test doing is fixing that path in the database file if needed (mobilesheets.db is under the MobileSheets folder on the iPad) to see if that has any impact on the issue. If so, then we need to figure out why the companion app on that particular Linux variant is behaving that way, as I didn't see that with Ubuntu. 

Thanks,
Mike