computer-janitor-gtk crashed with DBusException in call_blocking(): org.freedesktop.DBus.Error.ServiceUnknown: The name :1.128 was not provided by any .service files

Binary package hint: computer-janitor

tried to use computer janitor but got error message that said i couldnt use it while another package manager was open such as synaptic; but, i didnt have another package manager open

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: computer-janitor-gtk 2.1.0-0ubuntu4
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Sun Apr 3 20:03:03 2011
ExecutablePath: /usr/share/computerjanitor/computer-janitor-gtk
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
InterpreterPath: /usr/bin/python2.7
ProcCmdline: /usr/bin/python /usr/share/computerjanitor/computer-janitor-gtk
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/share/computerjanitor/computer-janitor-gtk']
SourcePackage: computer-janitor
Title: computer-janitor-gtk crashed with DBusException in call_blocking(): org.freedesktop.DBus.Error.ServiceUnknown: The name :1.128 was not provided by any .service files
UpgradeStatus: Upgraded to natty on 2011-04-02 (1 days ago)
UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare