Crash when installing distro update 13.04 - ERROR openCache() failed

[John Obiols]

When updating Os from Synaptic to 13.04 from 12.10. Update process crashing towards the begining of updating.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: ubuntu-release-upgrader-core 1:0.190.6
ProcVersionSignature: Ubuntu 3.5.0-27.46-generic 3.5.7.7
Uname: Linux 3.5.0-27-generic x86_64
ApportVersion: 2.6.1-0ubuntu10
Architecture: amd64
Date: Thu Apr 25 17:49:26 2013
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-precise-amd64-20120703-2
InstallationDate: Installed on 2013-03-05 (51 days ago)
InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20120703-15:08
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 TERM=unknown
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to quantal on 2013-04-25 (0 days ago)
VarLogDistupgradeTermlog:

[Sasa Paporovic (melchiaros)]

In VarLogDistupgradeMainlog.txt:

2013-04-25 17:49:17,886 ERROR openCache() failed: 'E:Could not open file /var/lib/apt/lists/archive.canonical.com_ubuntu_dists_quantal_partner_binary-i386_Packages - open (24: Too many open files), E:Could not open file /var/lib/apt/lists
.
.
.
2013-04-25 17:49:17,886 ERROR self.prepared() failed
2013-04-25 17:49:25,869 DEBUG enabling apt cron job