Ubuntu 13.10=>14.04 Updater Gives error

[Turner Hall]

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 Ubuntu

If none of this applies, then please report this bug using the command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.
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Upgrading from 13.10=>14.04

Using Cinnamon Desktop

All third party repos disabled, and conflicting packages have been resolved.

Not using a beta release of ubuntu.

I do have many third party applications from seperate repos installed, but I cannot possibly account for all of them.

So it seems as if none of the above from the error applies.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: ubuntu-release-upgrader-core 1:0.205
ProcVersionSignature: Ubuntu 3.11.0-18.32-generic 3.11.10.4
Uname: Linux 3.11.0-18-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
CrashDB: ubuntu
Date: Thu Apr 17 10:27:09 2014
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to saucy on 2014-04-17 (0 days ago)
VarLogDistupgradeTermlog: