[Bug 1241304] Re: Upgrading from 13.04 to 13.10 crashes, "Could not calculate the upgrade" error message

[Petr A. Sokolnikov]

*** This bug is a duplicate of bug 1242570 ***
    https://bugs.launchpad.net/bugs/1242570

** This bug has been marked a duplicate of bug 1242570
   update-manager crashes when trying to upgrade to 13.10

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https://bugs.launchpad.net/bugs/1241304

Title:
  Upgrading from 13.04 to 13.10 crashes, "Could not calculate the
  upgrade" error message

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

Bug description:
  When upgrading from 13.04 to 13.10 the process stops with this
  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
  NonfreeKernelModules: wl
  ApportVersion: 2.9.2-0ubuntu8.3
  Architecture: amd64
  CrashDB: ubuntu
  Date: Thu Oct 17 19:37:16 2013
  InstallationDate: Installed on 2013-05-02 (168 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to raring on 2013-10-18 (0 days ago)
  VarLogDistupgradeTermlog:

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