There seems to be an issue with the mirror you've used. 2014-08-13 11:07:50,302 ERROR No 'ubuntu-minimal' available/downloadable after sources.list rewrite+update
Try replacing it with a different one and trying the upgrade again. ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1356249 Title: cannot upgrade to ubuntu 14 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1356249/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs