[Bug 1241487] [NEW] Release upgrade aborts with error message

[Jens Herrmann]

Public bug reported:

The upgrade to 13.10 fails with the following message:

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.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: ubuntu-release-upgrader-core 1:0.192.13
ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
Uname: Linux 3.8.0-31-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: amd64
CrashDB: ubuntu
Date: Fri Oct 18 12:24:44 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2012-08-13 (430 days ago)
InstallationMedia: Xubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to raring on 2013-10-18 (0 days ago)
VarLogDistupgradeTermlog:

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade raring

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https://bugs.launchpad.net/bugs/1241487

Title:
  Release upgrade aborts with error message

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

Bug description:
  The upgrade to 13.10 fails with the following message:

  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.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: ubuntu-release-upgrader-core 1:0.192.13
  ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
  Uname: Linux 3.8.0-31-generic x86_64
  ApportVersion: 2.9.2-0ubuntu8.3
  Architecture: amd64
  CrashDB: ubuntu
  Date: Fri Oct 18 12:24:44 2013
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2012-08-13 (430 days ago)
  InstallationMedia: Xubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to raring on 2013-10-18 (0 days ago)
  VarLogDistupgradeTermlog:

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