That version is now dead
http://news.softpedia.com/news/ubuntu-17-04-zesty-zapus-has-reached-end-of-life-upgrade-to-ubuntu-17-10-now-519360.shtml
Having 3d party packages installed is the main trouble source.
** Changed in: ubuntu-release-upgrader (Ubuntu)
Status: Confirmed => Invalid
--
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: ubuntu-release-upgrader (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1726
** This bug is no longer a duplicate of bug 1725359
release detection relies on lsb-release
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https://bugs.launchpad.net/bugs/1726347
Title:
Failed to upgrade from 17.04 to 17.10
To
*** This bug is a duplicate of bug 1725359 ***
https://bugs.launchpad.net/bugs/1725359
** This bug has been marked a duplicate of bug 1725359
release detection relies on lsb-release
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You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubunt
** This bug is no longer a duplicate of bug 1725605
upgrade to 17.10 uncalculable without universe
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You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1726347
Title:
Failed to upgrade from 17.04 to 17.
*** This bug is a duplicate of bug 1725605 ***
https://bugs.launchpad.net/bugs/1725605
** This bug has been marked a duplicate of bug 1725605
upgrade to 17.10 uncalculable without universe
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You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed t
** Tags added: zesty2artful
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1726347
Title:
Failed to upgrade from 17.04 to 17.10
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