piston_generic_helper.py crashed with DBusException in call_blocking(): org.freedesktop.DBus.Error.ServiceUnknown: The name :1.284 was not provided by any .service files

[Enkouyami]

I was trying to install a .deb file.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: software-center 5.1.14.1
ProcVersionSignature: Ubuntu 3.2.0-22.35-generic 3.2.14
Uname: Linux 3.2.0-22-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0-0ubuntu4
Architecture: amd64
CrashCounter: 1
Date: Fri Apr 6 12:19:19 2012
ExecutablePath: /usr/share/software-center/piston_generic_helper.py
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120331)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/share/software-center/piston_generic_helper.py --datadir /usr/share/software-center/ --needs-auth UbuntuSsoAPI whoami
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
PythonArgs: ['/usr/share/software-center/piston_generic_helper.py', '--datadir', '/usr/share/software-center/', '--needs-auth', 'UbuntuSsoAPI', 'whoami']
SourcePackage: software-center
Title: piston_generic_helper.py crashed with DBusException in call_blocking(): org.freedesktop.DBus.Error.ServiceUnknown: The name :1.284 was not provided by any .service files
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Launchpad Janitor (janitor)]

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

[Stéphane Guillou (stephane-guillou)]

Happened to me just by navigating from a category back to the home page, on my netbook Samsung N310 with 12.04 beta and Unity 3D.