18.04-1 upgrade fails says 3rd part or limited release install?. none applies

[David Armstrong]

Could not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade.

 This can be caused by:
 * Upgrading to a pre-release version of Ubuntu
 * Running the current pre-release version of Ubuntu
 * Unofficial software packages not provided by Ubuntu

If none of this applies, then please report this bug using the command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.

None of the above applies to my system.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.25
ProcVersionSignature: Ubuntu 4.15.0-34.37~16.04.1-generic 4.15.18
Uname: Linux 4.15.0-34-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: MATE
Date: Sun Sep 23 14:36:58 2018
InstallationDate: Installed on 2017-01-24 (607 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2018-09-23 (0 days ago)
VarLogDistupgradeTermlog:

[Brian Murray (brian-murray)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. The error that you are a reporting is a conflict between packages from the official Ubuntu archive and packages from a PPA. To resolve this situation please deactivate PPAs using the tool 'ppa-purge' which is provided by the ppa-purge package. Then try performing the release upgrade again. Thanks in advance!

[David Armstrong (1nv1c7u5m4n30)]

Thanks for the response but that isn't the problem either.
I've already deactivated every PPA except the official ubuntu rep. and the
same error continues.
Any other thoughts?

Thanks, David A.

On Thu, Sep 27, 2018 at 6:45 AM Brian Murray <email address hidden> wrote:

> Thank you for taking the time to report this bug and helping to make
> Ubuntu better. The error that you are a reporting is a conflict between
> packages from the official Ubuntu archive and packages from a PPA. To
> resolve this situation please deactivate PPAs using the tool 'ppa-purge'
> which is provided by the ppa-purge package. Then try performing the
> release upgrade again. Thanks in advance!
>
> ** Changed in: ubuntu-release-upgrader (Ubuntu)
> Status: New => Invalid
>
> ** Tags added: ppa-conflict
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1793983
>
> Title:
> 18.04-1 upgrade fails says 3rd part or limited release install?. none
> applies
>
> Status in ubuntu-release-upgrader package in Ubuntu:
> Invalid
>
> Bug description:
> Could not calculate the upgrade
>
> An unresolvable problem occurred while calculating the upgrade.
>
> This can be caused by:
> * Upgrading to a pre-release version of Ubuntu
> * Running the current pre-release version of Ubuntu
> * Unofficial software packages not provided by Ubuntu
>
> If none of this applies, then please report this bug using the command
> 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.
>
> None of the above applies to my system.
>
> ProblemType: Bug
> DistroRelease: Ubuntu 16.04
> Package: ubuntu-release-upgrader-core 1:16.04.25
> ProcVersionSignature: Ubuntu 4.15.0-34.37~16.04.1-generic 4.15.18
> Uname: Linux 4.15.0-34-generic x86_64
> ApportVersion: 2.20.1-0ubuntu2.18
> Architecture: amd64
> CrashDB: ubuntu
> CurrentDesktop: MATE
> Date: Sun Sep 23 14:36:58 2018
> InstallationDate: Installed on 2017-01-24 (607 days ago)
> InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64
> (20160719)
> PackageArchitecture: all
> SourcePackage: ubuntu-release-upgrader
> UpgradeStatus: Upgraded to xenial on 2018-09-23 (0 days ago)
> VarLogDistupgradeTermlog:
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1793983/+subscriptions
>