Public bug reported:

I am using 13.04 and am trying to upgrade to 13.10.

Using the Software Updater (GUI), it tells me that there is a new
version of Ubuntu available (13.10), and when I click the Upgrade button
it asks me to authenticate. When I enter my password and hit the
Authenticate button, all windows disappear and nothing happens.

I then used "do-release-upgrade" in a terminal, and here is the error:

Checking package manager
Reading package lists... Done    
Building dependency tree          
Reading state information... Done
Building data structures... Done 

Calculating the changes

Calculating the changes

Could not determine 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 13.04
Package: ubuntu-release-upgrader-core 1:0.192.13
ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
Uname: Linux 3.8.0-31-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.5
Architecture: amd64
CrashDB: ubuntu
Date: Sun Mar 23 01:27:49 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-09-10 (193 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to raring on 2014-03-22 (0 days ago)

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


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

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https://bugs.launchpad.net/bugs/1296163

Title:
  GUI updater does nothing when I authenticate and from a terminal I get
  Could not determine the upgrade   An unresolvable problem occurred
  while calculating the upgrade.

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