Distobution upgrade from 11.04 will not

[Darrell Rea]

I looked at "Bug #674265"
looks the same, only I am having the problem now, so it is not resolved.

I hope it is not me being stupid:
Could not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade:
E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

 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 update-manager' in a terminal.

I do not have: compiz-fusion-plugins-extra installed.
i did have compiz-fusion-plugings-main I have tried removing this to no avail.

I do not feel confident to try removing compiz-plugins-main

tried
update-manager -d from terminal

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: update-manager 1:0.150.5.4
ProcVersionSignature: Ubuntu 2.6.38-15.60-generic 2.6.38.8
Uname: Linux 2.6.38-15-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Wed Jun 27 09:50:55 2012
GConfNonDefault:
 /apps/update-manager/check_new_release_ignore=oneiric
 /apps/update-manager/first_run=false
 /apps/update-manager/show_details=true
 /apps/update-manager/window_size=(600,600)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: Upgraded to natty on 2012-06-27 (0 days ago)
VarLogDistupgradeApttermlog:

VarLogDistupgradeHistorylog:

VarLogDistupgradeTermlog:

[dino99 (9d9)]

That version is no more maintained