error upgrading frm 14.01LTS to 16LTS

[Jaideep Nathani]

I am trying to upgrade my current version to ubuntu 16. However I keep running into this problem. It happen even when I try 15 or even 14.1. Please help me

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 4.2.0-36.41~14.04.1-generic 4.2.8-ckt8
Uname: Linux 4.2.0-36-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Sun May 15 11:39:39 2016
InstallationDate: Installed on 2016-04-23 (21 days ago)
InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64 (20160217.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-05-15 (0 days ago)
mtime.conffile..etc.update.manager.release.upgrades: 2016-05-15T09:21:28.016183