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On 10/8/07, james kilty <james@xxxxxxxxxxxxxxxxx> wrote: > Dear all > > I coupled an ancient usb scanner up to see if I could use it and got the > error "Failed to open device 'snapscan:libusb:001:003': Invalid > argument. > > Please can you tell me where I can find how to interpret errors of this > nature in case there is anything I can actually do about it. Sounds like a call from sane or one of one of the sane libs. Do you have permissions to open the USB device, scanners seem to be a slight pain as the udev rules are not always set for the required USB ID to give user (not root) access. Try "sane-find-scanner"and "scanimage -L" to see if sane knows about your scanner (as root), if you can get the sane tools playing as root then get them working as normal user. man sane, man sane-find-scanner, man scanimage may be of help Robin -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html