[Bug 1254440] Re: Can't upgrade to ubuntu 13.10

[Nik.Th.]

Thank you for taking the time to report this bug and trying to help make Ubuntu better. However, it seems that the third reason is applied. 
  (* Unofficial software packages not provided by Ubuntu)

You have external sources enabled (like PPAs) and the upgrade could not
continue.

Please read some answers  as a guide on how to upgrade your Ubuntu installation without problems. 
http://askubuntu.com/questions/203301/how-to-safely-upgrade-from-an-older-ubuntu-version-to-a-newer-one

Best Regards 
    NikTh


** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Invalid

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubuntu-release-upgrader in
Ubuntu.
https://bugs.launchpad.net/bugs/1254440

Title:
  Can't upgrade to ubuntu 13.10

Status in “ubuntu-release-upgrader” package in Ubuntu:
  Invalid

Bug description:
  When running the upgrade it stops and says:

  Could not determine 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.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: ubuntu-release-upgrader-core 1:0.192.13
  ProcVersionSignature: Ubuntu 3.8.0-33.48-generic 3.8.13.11
  Uname: Linux 3.8.0-33-generic i686
  ApportVersion: 2.9.2-0ubuntu8.5
  Architecture: i386
  CrashDB: ubuntu
  Date: Sun Nov 24 15:27:30 2013
  InstallationDate: Installed on 2012-02-26 (637 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120218)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to raring on 2013-11-24 (0 days ago)
  VarLogDistupgradeTermlog:

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1254440/+subscriptions