[Bug 1742784] Re: The update from Ubuntu 14.04 to 16.04 doesnt work

[Ubuntu Foundations Team Bug Bot]

** Tags added: trusty2xenial

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https://bugs.launchpad.net/bugs/1742784

Title:
  The update from Ubuntu 14.04 to 16.04 doesnt work

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

Bug description:
  
  Upgrading form Ubuntu 14.04 to 16.04: Error 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 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.9
  ProcVersionSignature: Ubuntu 4.4.0-109.132~14.04.1-generic 4.4.98
  Uname: Linux 4.4.0-109-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.27
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Thu Jan 11 20:42:31 2018
  InstallationDate: Installed on 2015-11-06 (797 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2018-01-11 (0 days ago)
  VarLogDistupgradeTermlog:

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