The upgrade failed to calculate due to an error communicating with your mirror of the Ubuntu archive. From VarLogDistupgradeMainlog.txt:
2019-04-24 10:09:49,633 DEBUG Checking pkg: ubuntu-minimal 2019-04-24 10:09:49,635 DEBUG Checking pkg: ubuntu-standard 2019-04-24 10:09:49,636 DEBUG examining: 'deb ftp://ftp.fu-berlin.de/linux/ubuntu/ cosmic main restricted' 2019-04-24 10:09:49,637 DEBUG verifySourcesListEntry: deb ftp://ftp.fu-berlin.de/linux/ubuntu/ disco main restricted 2019-04-24 10:09:49,637 DEBUG url_downloadable: ftp://ftp.fu-berlin.de/linux/ubuntu//dists/disco/Release 2019-04-24 10:09:49,637 DEBUG s='ftp' n='ftp.fu-berlin.de' p='/linux/ubuntu//dists/disco/Release' q='' f='' 2019-04-24 10:09:49,996 DEBUG error from ftplib: '550 SIZE not allowed in ASCII mode' 2019-04-24 10:09:49,996 DEBUG entry '# deb ftp://ftp.fu-berlin.de/linux/ubuntu/ cosmic main restricted' was disabled (no Release file) I'd suggest switching to a different mirror of the Ubuntu archive or switching from ftp to http and see if the upgrade is then calculatable. Thanks! ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Incomplete ** Summary changed: - Upgrader has very long answer times, finally it crashes + Upgrader has very long answer times, finally it stops -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1826177 Title: Upgrader has very long answer times, finally it stops To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1826177/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
