Basically I have uni stalled the operating system and reinstalled it.
Problem solved!

________________________
Lee G. Madeley (M.Sc.)
*               072 187 9821** *


On Fri, Apr 26, 2013 at 4:30 PM, Danloaiza <email address hidden> wrote:

> I have the same bug after installing Ubuntu 13.04.
>
> I have tried to uninstall software-center and install it again, it didnt
> fix it.
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (1125176).
> https://bugs.launchpad.net/bugs/1068680
>
> Title:
>   Software center does not start [dbus.proxies - ERROR - Introspect
>   error]
>
> Status in Ubuntu Single Sign On Client:
>   New
> Status in “dbus-python” package in Ubuntu:
>   Confirmed
>
> Bug description:
>   If I type
>    software-center
>   in the terminal, I get the following error and the program do not start:
>   2012-10-19 11:47:14,260 - softwarecenter.ui.gtk3.app - INFO - setting up
> proxy 'None'
>   2012-10-19 11:47:14,369 - softwarecenter.db.database - INFO - open()
> database: path=None use_axi=True use_agent=True
>   2012-10-19 11:47:17,104 - softwarecenter.fixme - WARNING - logs to the
> root logger: '('/usr/lib/python2.7/dist-packages/dbus/proxies.py', 410,
> '_introspect_error_handler')'
>   2012-10-19 11:47:17,104 - dbus.proxies - ERROR - Introspect error on
> com.ubuntu.sso:/com/ubuntu/sso/credentials: dbus.exceptions.DBusException:
> org.freedesktop.DBus.Error.Spawn.ChildExited: Process
> /usr/lib/ubuntu-sso-client/ubuntu-sso-login exited with status 1
>   Traceback (most recent call last):
>     File "/usr/bin/software-center", line 130, in <module>
>       app = SoftwareCenterAppGtk3(options, args)
>     File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line
> 337, in __init__
>       self.icons)
>     File
> "/usr/share/software-center/softwarecenter/ui/gtk3/session/appmanager.py",
> line 66, in __init__
>       self.oauth_token = helper.find_oauth_token_sync()
>     File "/usr/share/software-center/softwarecenter/backend/ubuntusso.py",
> line 139, in find_oauth_token_sync
>       sso.find_credentials()
>     File
> "/usr/share/software-center/softwarecenter/backend/login_impl/login_sso.py",
> line 75, in find_credentials
>       self.proxy.find_credentials(self.appname, self._get_params())
>     File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 70, in
> __call__
>       return self._proxy_method(*args, **keywords)
>     File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 145, in
> __call__
>       **keywords)
>     File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651,
> in call_blocking
>       message, timeout)
>   dbus.exceptions.DBusException:
> org.freedesktop.DBus.Error.Spawn.ChildExited: Process
> /usr/lib/ubuntu-sso-client/ubuntu-sso-login exited with status 1
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 12.10
>   Package: software-center 5.4.1.2
>   ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
>   Uname: Linux 3.5.0-17-generic i686
>   ApportVersion: 2.6.1-0ubuntu3
>   Architecture: i386
>   Date: Fri Oct 19 11:48:12 2012
>   InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386
> (20121017.2)
>   PackageArchitecture: all
>   ProcEnviron:
>    LANGUAGE=pt_BR:
>    PATH=(custom, no user)
>    XDG_RUNTIME_DIR=<set>
>    LANG=pt_BR.UTF-8
>    SHELL=/bin/bash
>   SourcePackage: software-center
>   UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu-sso-client/+bug/1068680/+subscriptions
>