Figured out that I just had to install some packages (libgfortran4 and cpp-7 for my case) required by the hold back packages (listed in Apt log)..
.. and finally the Bionic Beaver could be brought back to life. I also did this before because I ran through the same error: https://askubuntu.com/questions/943463/e-problem-executing-scripts-apt- updatepost-invoke-success-error-during-apt-ge .. but not sure if it is related. ** Summary changed: - LTS dist upgrade failure from 16.04 to 18.04 + [SOLVED] LTS dist upgrade failure from 16.04 to 18.04 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1810450 Title: [SOLVED] LTS dist upgrade failure from 16.04 to 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1810450/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
