Upgrade from 10.04 to 12.04 failed: Could not calculate the upgrade

[fontinalis]

An unresolvable problem occurred while calculating the upgrade:
E:Unable to correct problems, you have held broken packages.

Ran update-manager -d and the upgrade fails every time on calculating. I have disabled all other software repositories in software center and it still fails. will have to do a fresh install with the iso but just wanted to try an upgrade.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: update-manager 1:0.134.12.1
ProcVersionSignature: Ubuntu 3.0.0-22.36~lucid1-generic 3.0.33
Uname: Linux 3.0.0-22-generic i686
Architecture: i386
Date: Sat Jul 7 12:54:39 2012
GConfNonDefault:
 /apps/update-manager/check_new_release_ignore=
 /apps/update-manager/first_run=false
 /apps/update-manager/show_versions=false
 /apps/update-manager/window_size=(1398,985)
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: update-manager
VarLogDistupgradeTermlog:

[dino99 (9d9)]

This version is no more supported