[Bug 1357614] Re: Can't upgrade from 12.04 to 14.04

[santino]

** Changed in: update-manager (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1357614

Title:
  Can't upgrade from 12.04 to 14.04

Status in “update-manager” package in Ubuntu:
  Incomplete

Bug description:
  Got the following error. I'm running Ubuntu in a VM in VirtualBox.

  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 12.04
  Package: update-manager 1:0.156.14.17
  ProcVersionSignature: Ubuntu 3.2.0-67.101-generic 3.2.60
  Uname: Linux 3.2.0-67-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  Date: Fri Aug 15 19:14:17 2014
  GsettingsChanges:
   com.ubuntu.update-manager first-run false
   com.ubuntu.update-manager launch-time 1408154757
   com.ubuntu.update-manager window-height 702
   com.ubuntu.update-manager window-width 1213
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
  MarkForUpload: True
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: Upgraded to precise on 2014-08-16 (0 days ago)

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