do-release-upgrade crashed with SystemError in open(): E:Problem renaming the file /var/cache/apt/pkgcache.bin.cn9u6r to /var/cache/apt/pkgcache.bin - rename (2: No such file or directory), W:You may want to run apt-get update to correct these problems

[Daniel Holbach]

No idea what happened.

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: ubuntu-release-upgrader-core 1:0.192.5
ProcVersionSignature: Ubuntu 3.8.0-2.6-generic 3.8.0-rc4
Uname: Linux 3.8.0-2-generic x86_64
ApportVersion: 2.8-0ubuntu3
Architecture: amd64
CrashDB: ubuntu
Date: Thu Jan 31 08:21:35 2013
ExecutablePath: /usr/bin/do-release-upgrade
InstallationDate: Installed on 2011-08-19 (530 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110817)
InterpreterPath: /usr/bin/python3.3
MarkForUpload: True
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/lib/ubuntu-release-upgrader/check-new-release -q
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
PythonArgs: ['/usr/lib/ubuntu-release-upgrader/check-new-release', '-q']
SourcePackage: ubuntu-release-upgrader
Title: do-release-upgrade crashed with SystemError in open(): E:Problem renaming the file /var/cache/apt/pkgcache.bin.cn9u6r to /var/cache/apt/pkgcache.bin - rename (2: No such file or directory), W:You may want to run apt-get update to correct these problems
UpgradeStatus: Upgraded to raring on 2013-01-17 (14 days ago)
UserGroups: utah

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Nicholas (munenenicholas)]

I want to fix this bug, please put a solution in simple language, all that coding i'm seeing I don't understand