Why command 'rhn-channel -L' fails with '<type 'exceptions.TypeError'>: Parse() argument 1 must be string or read-only buffer, not None.' ?

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 5.8 and later
  • rhn-channel

Issue

  • Execution of rhn-channel -L command fails with
<type 'exceptions.TypeError'>: Parse() argument 1 must be string or read-only buffer, not None

# rhn-channel -L
Username:
Password: 
Ein Fehler trat auf:
<type 'exceptions.TypeError'>
up2date 
Traceback (most recent call last):
  File "/usr/sbin/rhn-channel", line 176, in <module>
    main()
  File "/usr/sbin/rhn-channel", line 167, in main
    channels = get_available_channels(OPTIONS.user, OPTIONS.password)
  File "/usr/sbin/rhn-channel", line 106, in get_available_channels
    system_id = re.sub('^ID-', '', rpclib.xmlrpclib.loads(up2dateAuth.getSystemId())[0][0]['system_id'])
  File "/usr/lib64/python2.6/xmlrpclib.py", line 1182, in loads
    p.feed(data)
  File "/usr/lib64/python2.6/xmlrpclib.py", line 601, in feed
    self._parser.Parse(data, 0)
<type 'exceptions.TypeError'>: Parse() argument 1 must be string or read-only buffer, not None

Resolution

  • The system is not registered with RHN Classic, to use rhn-channel -L make sure that system is registered only using RHN Classic.

Root Cause

  • The system is not registered with RHN Classic, to use rhn-channel -L make sure that system is registered only using RHN Classic.

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