The "cups" module is provided by the python-cups package and /lib/udev /udev-add-printer is part of the system-config-printer-udev package which depends on python-cups (at least in Oneiric).
Probably there are some files corrupted on your system. Run the commands sudo apt-get install python-cups sudo apt-get install --reinstall python-cups in a terminal window to get this fixed. ** Changed in: system-config-printer (Ubuntu) Status: Confirmed => Invalid ** Changed in: system-config-printer (Ubuntu) Status: Invalid => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/592027 Title: udev-add-printer crashed with ImportError in <module>() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/system-config-printer/+bug/592027/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs