[Bug 1384237] [NEW] Unable to upgrade from 12.04 to 14.04 (server)

[Freeben666]

Public bug reported:

Here is the end of the output from the "do-release-upgrade" command :

Calcul des modifications en cours

Impossible d'évaluer la mise à niveau

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

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager (not installed)
ProcVersionSignature: Ubuntu 3.2.0-69.103-generic 3.2.62
Uname: Linux 3.2.0-69-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.7
Architecture: amd64
Date: Wed Oct 22 14:40:37 2014
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
Symptom: ubuntu-release-upgrader-core
UpgradeStatus: Upgraded to precise on 2014-10-22 (0 days ago)

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade precise

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to update-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1384237

Title:
  Unable to upgrade from 12.04 to 14.04 (server)

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

Bug description:
  Here is the end of the output from the "do-release-upgrade" command :

  Calcul des modifications en cours

  Impossible d'évaluer la mise à niveau

  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

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: update-manager (not installed)
  ProcVersionSignature: Ubuntu 3.2.0-69.103-generic 3.2.62
  Uname: Linux 3.2.0-69-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.7
  Architecture: amd64
  Date: Wed Oct 22 14:40:37 2014
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-manager
  Symptom: ubuntu-release-upgrader-core
  UpgradeStatus: Upgraded to precise on 2014-10-22 (0 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1384237/+subscriptions