Help with Epson 3490 Photo Scanner

[Peter Goggin]

When I upgraded to the latest ubuntu release and connected my usb
scanner Xsane found it and I was able to scan some pages. I restarted my
computer today and Xsan does not find the scanner and I get the message:
Failed to open device 'snalscan:libusb:001:005': invalid argument.

What does this mean and why has shutting the ccomputer down and
restarting caused the problem?


Regards 


Peter Goggin