error upgrading from 12.04 to 14.04

[rwharper]

This error occurs on my EeePC. It says it cannot calculate requirements? I have tried it many times.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.14.17
ProcVersionSignature: Ubuntu 3.2.0-74.109-generic-pae 3.2.64
Uname: Linux 3.2.0-74-generic-pae i686
ApportVersion: 2.0.1-0ubuntu17.8
Architecture: i386
Date: Tue Jan 6 11:51:15 2015
GsettingsChanges:
 com.ubuntu.update-manager first-run false
 com.ubuntu.update-manager launch-time 1420562742
 com.ubuntu.update-manager window-height 515
 com.ubuntu.update-manager window-width 599
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release i386 (20120817.3)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
Symptom: ubuntu-release-upgrader-core
UpgradeStatus: Upgraded to precise on 2015-01-06 (0 days ago)
VarLogDistupgradeTermlog: