While trying to install ubuntu restricted extras package from the ubuntu software-center,it suddenly got crashed and after typing "software-center" in terminal,it is showing: 2012-08-24 20:55:20,221 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None' 2012-08-24 20:55:20,327 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True 2012-08-24 20:55:20,362 - softwarecenter.db.database - ERROR - failed to add apt-xapian-index Traceback (most recent call last): File "/usr/share/software-center/softwarecenter/db/database.py", line 179, in _get_new_xapiandb softwarecenter.paths.APT_XAPIAN_INDEX_DB_PATH) File "/usr/lib/python2.7/dist-packages/xapian/init.py", line 3666, in init _xapian.Database_swiginit(self,_xapian.new_Databas e(*args)) DatabaseOpeningError: Couldn't stat '/var/lib/apt-xapian-index/index' (No such file or directory) 2012-08-24 20:55:21,118 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file Traceback (most recent call last): File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 242, in open self._cache = apt.Cache(GtkMainIterationProgress()) File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 102, in init self.open(progress) File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 145, in open self._cache = apt_pkg.Cache(progress) SystemError: E:Encountered a section with no Package: header, Eroblem with MergeList /var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_precise-updates_main_binary-i386_Packages, E:The package lists or status file could not be parsed or opened. 2012-08-24 20:55:23,234 - softwarecenter.db.categories - WARNING - sort by cataloged time requested but your a-x-i does not seem to support that yet 2012-08-24 20:55:24,252 - softwarecenter.db.categories - WARNING - sort by cataloged time requested but your a-x-i does not seem to support that yet 2012-08-24 20:55:24,375 - softwarecenter.db.categories - WARNING - sort by cataloged time requested but your a-x-i does not seem to support that yet 2012-08-24 20:55:24,445 - softwarecenter.db.categories - WARNING - sort by cataloged time requested but your a-x-i does not seem to support that yet 2012-08-24 20:55:24,511 - softwarecenter.db.categories - WARNING - sort by cataloged time requested but your a-x-i does not seem to support that yet 2012-08-24 20:55:24,792 - softwarecenter.db.enquire - ERROR - _get_estimate_nr_apps_and_nr_pkgs failed Traceback (most recent call last): File "/usr/share/software-center/softwarecenter/db/enquire.py", line 115, in _get_estimate_nr_apps_and_nr_pkgs tmp_matches = enquire.get_mset(0, len(self.db), None, xfilter) File "/usr/share/software-center/softwarecenter/db/appfilter.py", line 89, in call if (not pkgname in self.cache and File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 262, in contains return self._cache.contains(k) AttributeError: 'NoneType' object has no attribute 'contains' Traceback (most recent call last): File "/usr/bin/software-center", line 176, in app.run(args) File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1341, in run self.show_available_packages(args) File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1271, in show_available_packages self.view_manager.set_active_view(ViewPages.AVAILA BLE) File "/usr/share/software-center/softwarecenter/ui/gtk3/session/viewmanager.py", line 149, in set_active_view view_widget.init_view() File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/availablepane.py", line 165, in init_view self.apps_filter) File "/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 240, in init self.build(desktopdir) File "/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 491, in build self._build_homepage_view() File "/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 267, in _build_homepage_view self._append_top_rated() File "/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 404, in _append_top_rated top_rated_cat = self._update_top_rated_content() File "/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 391, in _update_top_rated_content docs = top_rated_cat.get_documents(self.db) File "/usr/share/software-center/softwarecenter/db/categories.py", line 124, in get_documents nonblocking_load=False) File "/usr/share/software-center/softwarecenter/db/enquire.py", line 317, in set_query self._blocking_perform_search() File "/usr/share/software-center/softwarecenter/db/enquire.py", line 212, in _blocking_perform_search matches = enquire.get_mset(0, self.limit, None, xfilter) File "/usr/share/software-center/softwarecenter/db/appfilter.py", line 89, in call if (not pkgname in self.cache and File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 262, in contains return self._cache.contains(k) AttributeError: 'NoneType' object has no attribute 'contains'
Please help....I am a beginner nd dont know what to do about it....Please...
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