Comment 27 for bug 996916

en voulant faire de mise a niveau pour passer a la nouvelle version.( de 14.4 a la nouvelle version.)

Bug Description

I have got this pop-up error message while updating from Ubuntu version 11.04 to 11.10:

Could not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade:
The package 'postgresql-plperl-8.4' is marked for removal but it is in the removal blacklist.

 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 update-manager' in a terminal.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: update-manager 1:0.150.5.2
ProcVersionSignature: Ubuntu 2.6.38-15.59-generic 2.6.38.8
Uname: Linux 2.6.38-15-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Wed May 9 15:17:02 2012
GConfNonDefault:
 /apps/update-manager/check_new_release_ignore=oneiric
 /apps/update-manager/first_run=false
 /apps/update-manager/window_size=(600,600)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: Upgraded to natty on 2012-05-09 (0 days ago)
VarLogDistupgradeApttermlog:

VarLogDistupgradeHistorylog:

VarLogDistupgradeSystemstatetargz:

VarLogDistupgradeTermlog: