[Bug 1241240] [NEW] Fail to dist-upgrade to 13.10

[Carybielenberg]

Public bug reported:

Comes up with error...
Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade. This can be caused by: * Upgradeing to a pre release version of Ubuntu * Unofficial software packages not provided by Ubuntu.

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

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https://bugs.launchpad.net/bugs/1241240

Title:
  Fail to dist-upgrade to 13.10

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

Bug description:
  Comes up with error...
  Could not calculate the upgrade
  An unresolvable problem occurred while calculating the upgrade. This can be caused by: * Upgradeing to a pre release version of Ubuntu * Unofficial software packages not provided by Ubuntu.

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