I have finally proceeded with a partial upgrade. It seems to have worked. I have not investigated all packages and PPAs yet. However I am much relieved.
Thanks -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1921798 Title: I think it couldn't estimate what was needed for the upgrade and said it couldn't proceed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1921798/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
