[Bug 1313872] [NEW] Unresolvable problem occured while calculating the upgrade

[alei69]

Public bug reported:

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

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New

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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:
  New

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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