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I am beginner and installed Ubuntu on dual boot with windows, Then just started updating packages. I was about to finish But suddenly got error and Update manager just Stopped.After that my Software center is not opeining.When i tried through terminal it give me this error:

  hacked@hacked-Inspiron-N5050:~$ software-center
  2014-02-07 17:31:22,142 - softwarecenter.ui.gtk3.app - INFO - setting up proxy        'None'
  2014-02-07 17:31:22,148 - softwarecenter.db.database - INFO - open() database:       path=None use_axi=True use_agent=True
  2014-02-07 17:31:22,457 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file
  2014-02-07 17:31:22,583 - softwarecenter.ui.gtk3.app - INFO - show_available_packages: search_text is '', app is None.
  2014-02-07 17:31:22,591 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open()
 Traceback (most recent call last):
File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 243, 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, E:Problem with MergeList /var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_precise_restricted_i18n_Translation-en, E:The package lists or status file could not be parsed or opened.
2014-02-07 17:31:23,765 - 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 263, 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 <module>
app.run(args)
File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1422, in run
self.show_available_packages(args)
File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1352, in show_available_packages
self.view_manager.set_active_view(ViewPages.AVAILABLE)
 File "/usr/share/software-center/softwarecenter/ui/gtk3/session/viewmanager.py", line 154, in set_active_view
view_widget.init_view()
 File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/availablepane.py", line 171, in init_view
self.apps_filter)
 File "/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 238, in __init__
self.build(desktopdir)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 511, in build
self._build_homepage_view()
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 271, in _build_homepage_view
self._append_whats_new()
 File "/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 450, in _append_whats_new
whats_new_cat = self._update_whats_new_content()
 File "/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 439, in _update_whats_new_content
docs = whats_new_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 263, in __contains__
return self._cache.__contains__(k)
AttributeError: 'NoneType' object has no attribute '__contains__'

Then i just think of to reinstall it(Software center) with terminal,But it give me sort of error like :

hacked@hacked-Inspiron-N5050:~$ sudo apt-get --reinstall install software-center-f
[sudo] password for hacked: 
Reading package lists... Error!
E: Encountered a section with no Package: header
E: Problem with MergeList /var/lib/apt/lists/in.archive.ubuntu.com_ubuntu_dists_precise_restricted_i18n_Translation-en
E: The package lists or status file could not be parsed or opened.
hacked@hacked-Inspiron-N5050:~$
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the problem might have already been solved askubuntu.com/questions/30072/… –  JohnnyEnglish Feb 7 at 13:35
    
Hi,thank you for your response johny,I have resolved with problem. –  Avin Feb 8 at 20:51
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1 Answer 1

sudo rm -vf /var/lib/apt/lists/*
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