Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/UpdateManager/UpdateManager.py", line 953, in on_treeview_update_row_activated
    self.toggled(None, path)
  File "/usr/lib/python2.7/dist-packages/UpdateManager/UpdateManager.py", line 943, in toggled
    pkg.mark_install()
  File "/usr/lib/python2.7/dist-packages/apt/deprecation.py", line 98, in deprecated_function
    return func(*args, **kwds)
  File "/usr/lib/python2.7/dist-packages/apt/package.py", line 1269, in mark_install
    fixer.resolve(True)
SystemError: E:Unable to correct problems, you have held broken packages.