moozz

 sudo cobbler system dumpvars
Traceback (most recent call last):
  File "/usr/bin/cobbler", line 35, in <module>
    sys.exit(app.main())
  File "/usr/lib/python2.7/dist-packages/cobbler/cli.py", line 543, in main
    rc = cli.run(sys.argv)
  File "/usr/lib/python2.7/dist-packages/cobbler/cli.py", line 207, in run
    self.object_command(object_type, object_action)
  File "/usr/lib/python2.7/dist-packages/cobbler/cli.py", line 292, in object_command
    data = self.remote.get_blended_data("",options.name)
  File "/usr/lib/python2.7/xmlrpclib.py", line 1224, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib/python2.7/xmlrpclib.py", line 1569, in __request
    allow_none=self.__allow_none)
  File "/usr/lib/python2.7/xmlrpclib.py", line 1085, in dumps
    data = m.dumps(params)
  File "/usr/lib/python2.7/xmlrpclib.py", line 632, in dumps
    dump(v, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 654, in __dump
    f(self, value, write)
  File "/usr/lib/python2.7/xmlrpclib.py", line 658, in dump_nil
    raise TypeError, "cannot marshal None unless allow_none is enabled"
TypeError: cannot marshal None unless allow_none is enabled