Distribution upgrade crashed

[Richard Carter]

While trying to upgrade from 13.10 to 14.04 on AMD 64

Distribution Upgrade reached the stage "Setting new software channels" at which point it gave the message:
"Could not calculate 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 Ununtu"

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: ubuntu-release-upgrader-core 1:0.205.6
ProcVersionSignature: Ubuntu 3.11.0-20.35-generic 3.11.10.6
Uname: Linux 3.11.0-20-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
CrashDB: ubuntu
Date: Wed May 7 08:02:13 2014
InstallationDate: Installed on 2013-07-29 (281 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to saucy on 2014-05-07 (0 days ago)
VarLogDistupgradeTermlog:

[Ubuntu Foundations Team Bug Bot (crichton)]

You seem to have installed the cinnamon package on Ubuntu 13.10. Unfortunately, that package is not available yet for 14.04. To upgrade to Ubuntu 14.04 LTS you'll need to either wait for a fix for cinnamon to be available or uninstall the package and then upgrade.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]