Scheduled comparison of configuration channels fails with error 'Fatal error in Python code occured [[6]]' on Red Hat Satellite client

Issue

• Scheduled comparison of configuration channels fails with error Fatal error in Python code occured [[6]]
• Error in /var/log/up2date like the following:

Traceback (most recent call last):
  File "/usr/sbin/rhn_check", line 342, in __run_action
    (status, message, data) = CheckCli.__do_call(method, params, kwargs)
  File "/usr/sbin/rhn_check", line 335, in __do_call
    retval = method(*params, **kwargs)
  File "/usr/share/rhn/actions/configfiles.py", line 342, in diff
    diff = fp.diff(file)
  File "/usr/share/rhn/config_common/file_utils.py", line 128, in diff
    temp_file, temp_dirs = self.process(file_struct)
  File "/usr/share/rhn/config_common/file_utils.py", line 48, in process
    fullpath = directory + file_struct['path']
<type 'exceptions.TypeError'>: unsupported operand type(s) for +: 'NoneType' and 'str'