Could not determine the upgrade An unresolvable problem occurred while calculating the upgrade: E:Unable to correct problems, you have held broken packages.
This can be caused by: * Upgrading to a pre-release version of Ubuntu * Running the current pre-release version of Ubuntu * Unofficial software packages not provided by Ubuntu If none of this applies, then please report this bug against the 'update-manager' package and include the files in /var/log/dist-upgrade/ in the bug report. ** Attachment added: "apt.log" http://launchpadlibrarian.net/43970069/apt.log -- update-manager -d tar: /etc/apt/preferences: Cannot stat: No such file or directory https://bugs.launchpad.net/bugs/561872 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
