Traceback (most recent call last):
  File "/usr/share/system-config-printer/newprinter.py", line 3247, in on_tvNPModels_cursor_changed
    self.fillDriverList(self.NPMake, pmodel)
  File "/usr/share/system-config-printer/newprinter.py", line 3146, in fillDriverList
    ppds = self.ppds.getInfoFromModel(pmake, pmodel)
AttributeError: 'NoneType' object has no attribute 'getInfoFromModel'