Yes, dontzap was the main cause of the problem, the thing that is weird is that it takes 1 hour to calculate the upgrade and report this error.
** Changed in: update-manager (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/779960 Title: kubuntu upgrade 10.10 to 11.04 "Terminated with code 1" -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs