[Bug 1594233] Re: Cannot upgrade ubuntu from 14.04 LTS to 15.10 neither to 16.04 LTS

[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

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https://bugs.launchpad.net/bugs/1594233

Title:
  Cannot upgrade ubuntu from 14.04 LTS to 15.10 neither to 16.04 LTS

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

Bug description:
  I cannot upgrade ubuntu from 14.04 LTS to 15.10 neither to 16.04 LTS.

  Everytime I get the following error message:

  "Impossibile calcolare l'avanzamento

  Si è verificato un problema irrisolvibile durante il calcolo 
  dell'avanzamento. 

  I motivi possono essere: 
  * L'avanzamento a una versione di pre-rilascio di Ubuntu 
  * L'esecuzione dell'attuale versione di pre-rilascio di Ubuntu 
  * Pacchetti software non ufficiali non forniti da Ubuntu 

  Se non vengono installati, segnalare il problema usando il comando 
  «ubuntu-bug ubuntu-release-upgrader-core» in un terminale. "

  "That for the English version stands for:

  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 1:0.220.8
  ProcVersionSignature: Ubuntu 3.13.0-88.135-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-88-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Sun Jun 19 22:56:49 2016
  InstallationDate: Installed on 2012-03-25 (1547 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-06-20 (0 days ago)
  mtime.conffile..etc.update.manager.release.upgrades: 2016-06-19T21:14:43.760286

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