Can not upgrade to 14.04.01 LTS keeps throwing up error see below

[Mr. Alan E Hurd]

update-manager Ubuntu 14.04.01 LTS

Could not determine 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.
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Version Ubuntu 12.04 LTS
PC
AMD Athlon(tm) II X2 250 Processor × 2
64-bit

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.17
ProcVersionSignature: Ubuntu 3.2.0-74.109-generic 3.2.64
Uname: Linux 3.2.0-74-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu17.8
Architecture: amd64
CheckboxSubmission: caf3c540f87db5237cf99655e104e2bb
CheckboxSystem: 92d0a7b9779cc40ca6e505eb8aad9a01
Date: Sun Jan 4 19:02:31 2015
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
Symptom: ubuntu-release-upgrader-core
UpgradeStatus: Upgraded to precise on 2015-01-04 (0 days ago)
VarLogDistupgradeTermlog:

[Mr. Alan E Hurd (alan-val)]

Thanks for your prompt reply, but what happens now, or what can I do
to

upgrade.

I am not carrying any additional software or additions,
Flight Gear I have not even

heard of it before.

I am relatively new
to Linux but have been involved with computers since mid 1975.

I am
just totally confused st the moment.

Thanks Again for your reply.

Alan

Bring back DOS all is forgiven!!

On 05/01/2015 21:09, Brian
Murray wrote:

> *** This bug is a duplicate of bug 1308338 ***
>
https://bugs.launchpad.net/bugs/1308338
>
> ** This bug has been marked
a duplicate of bug 1308338
> Ubuntu 12.04 LTS -> 14.04 LTS upgrade fails
if Flight Gear installed
>
> --
> You received this bug notification
because you are subscribed to the bug
> report.
>
https://bugs.launchpad.net/bugs/1407493
>
> Title:
> Can not upgrade to
14.04.01 LTS keeps throwing up error see below
>
> Status in
update-manager package in Ubuntu:
> New
>
> Bug description:
>
update-manager Ubuntu 14.04.01 LTS
>
> Could not determine 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.
>
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
Version Ubuntu 12.04 LTS
> PC
> AMD Athlon(tm) II X2 250 Processor ×
2
> 64-bit
>
> ProblemType: Bug
> DistroRelease: Ubuntu 12.04
>
Package: update-manager 1:0.156.14.17
> ProcVersionSignature: Ubuntu
3.2.0-74.109-generic 3.2.64
> Uname: Linux 3.2.0-74-generic x86_64
>
NonfreeKernelModules: nvidia
> ApportVersion: 2.0.1-0ubuntu17.8
>
Architecture: amd64
> CheckboxSubmission:
caf3c540f87db5237cf99655e104e2bb
> CheckboxSystem:
92d0a7b9779cc40ca6e505eb8aad9a01
> Date: Sun Jan 4 19:02:31 2015
>
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64
(20110427.1)
> MarkForUpload: True
> PackageArchitecture: all
>
ProcEnviron:
> LANGUAGE=en_GB:en
> TERM=xterm
> PATH=(custom, no user)
>
LANG=en_GB.UTF-8
> SHELL=/bin/bash
> SourcePackage: update-manager
>
Symptom: ubuntu-release-upgrader-core
> UpgradeStatus: Upgraded to
precise on 2015-01-04 (0 days ago)
> VarLogDistupgradeTermlog:
>
> To
manage notifications about this bug go to:
>
https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1407493/+subscriptions