[Bug 1313872] Re: Unresolvable problem occured while calculating the upgrade

[Brian Murray]

Thank you for taking the time to report this bug and helping to make
Ubuntu better. Please execute the following command, as it will
automatically gather debugging information, in a terminal:

  apport-collect 1313872

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** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1313872

Title:
  Unresolvable problem occured while calculating the upgrade

Status in “ubuntu-release-upgrader” package in Ubuntu:
  Incomplete

Bug description:
  Message : "this can be caused by : *Upgrading to a pre-release  version  of Ubuntu *Running the current pre release version of Ubuntu *Unofficial sofware packages not provided by Ubuntu."
  As far as I know, nothing applies to my installation.
  It's a regular one with all updates.

  ~$ lsb_release -rd
  Description:    Ubuntu 13.10
  Release:        13.10

  ~$ sudo apt-cache policy pkgname
  N: Impossible de trouver le paquet pkgname

  ~$ sudo apt-get install pkgname
  Lecture des listes de paquets... Fait
  Construction de l'arbre des dépendances       
  Lecture des informations d'état... Fait
  E: Impossible de trouver le paquet pkgname

  regards,
  alei

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