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I deleted some unnecessary icon themes and now my application icons are changed. I cannot open Ubuntu software center also.... the following message is displayed....

success@user-pc:~$ software-center
2012-09-12 22:24:52,048 - - INFO - setting up proxy 'None'
2012-09-12 22:24:52,055 - softwarecenter.db.database - INFO - open() database: path=None 
use_axi=True use_agent=True
Traceback (most recent call last):
  File "/usr/bin/software-center", line 142, in <module>
    app = SoftwareCenterAppGtk3(datadir, xapian_base_path, options, args)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/", line 387, in __init__
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/", line 
78, in __init__
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/", line 192, in _get_emblems
    pb = icons.load_icon(emblem, self.ICON_SIZE, 0)
  File "/usr/lib/python2.7/dist-packages/gi/", line 43, in function
    return info.invoke(*args, **kwargs)
gi._glib.GError: Icon 'package-install' not present in theme

I also tried the following code to change the icon but no didnt work....

gksu gedit /usr/share/applications/ubuntu-software-center.desktop
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Was the answer helpful? – i08in Feb 18 '14 at 21:13

Some of the icons that you deleted were required by the software center, one of them being package-install located in /usr/share/icons/Humanity/actions/16/package-install.svg Try to get this file from a friend and then check if it works. Just a guess, not sure if this would work.

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