upgrade from 11.04 to 11.10 failed

[John Swanger]

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.

Upgraded to 11.04 within last 2 weeks so don't expect current op system is pre-release.
Do not expect 11.10 is pre-release.
Not aware of any 'unofficial' software packages on system.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: update-manager 1:0.150.5.4
ProcVersionSignature: Ubuntu 2.6.38-16.67-generic 2.6.38.8
Uname: Linux 2.6.38-16-generic i686
Architecture: i386
Date: Tue Nov 6 19:33:33 2012
GConfNonDefault:
 /apps/update-manager/check_new_release_ignore=
 /apps/update-manager/first_run=false
 /apps/update-manager/window_size=(600,600)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: Upgraded to natty on 2012-11-07 (0 days ago)
VarLogDistupgradeApttermlog:

VarLogDistupgradeHistorylog:

VarLogDistupgradeTermlog:

[dino99 (9d9)]

That version is no more maintained