It's looking for a firmware file. I went to a lot of trouble hunting this thing down. You need a small file named TAIL_061.BIN
. Download it from the embedded link. Do the following as user root.
1. Put TAIL_061.BIN in /usr/share/sane and give read permission to all. chmod a+r /usr/share/sane/TAIL_061.BIN
2. Edit /etc/sane.d/snapscan.conf and change following line (at the top of the file).
You should be able to start XSane.