I got this error too (ErrorMessage: SystemError in cache.commit(): installArchives() failed).
This is after doing an upgrade from Feisty to Gutsy, which crashed in the middle. And then I got the message you got: The upgrade aborts now. Your system could be in an unusable state. A recovery will run now (dpkg --configure -a). Then I did a "Partial Upgrade", which I thought was successful... Then I restarted my system. When it started back up I got this crash message for update-manager. -- [apport] package update-manager failed to install/upgrade: ErrorMessage: SystemError in cache.commit(): installArchives() failed https://bugs.launchpad.net/bugs/121919 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs