[Bug 1602429] Re: Crash when upgrading from 14.04 to 15 "Willy Werefolf": "Could not calculate the upgrade"

[Brian Murray]

*** This bug is a duplicate of bug 1384946 ***
    https://bugs.launchpad.net/bugs/1384946

** This bug has been marked a duplicate of bug 1384946
   Trying to upgrade to utopic, cannot compute changes due to gnuplot

-- 
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/1602429

Title:
  Crash when upgrading from 14.04 to 15 "Willy Werefolf": "Could not
  calculate the upgrade"

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

Bug description:
  I'm using Software Updater to attempt an upgrade to Ubuntu 15.  In
  Step 2 of the upgrade ("Setting new software channels") it returns
  this error:

  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.

  Of the three causes listed:

   * Upgrading to a pre-release version of Ubuntu
   - I don't believe 15 is in pre-release, right?
   * Running the current pre-release version of Ubuntu
   - I am not.  However, I did upgrade to 14.04 from 12.10;  would this have an impact?
   * Unofficial software packages not provided by Ubuntu
   - In the Software Update options I unchecked everything.

  Any advice appreciated.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-91.138-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-91-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Tue Jul 12 22:27:46 2016
  InstallationDate: Installed on 2013-05-18 (1151 days ago)
  InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 (20130213)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-07-12 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update.manager.release.upgrades: 2016-07-12T22:23:07.538281

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1602429/+subscriptions