[root@netserv ~]# yam -u
rhel4as-x86_64: Updating Red Hat Advanced Server 4 (x86_64)
Traceback (most recent call last):
  File "/usr/bin/rhnget", line 386, in ?
    main()
  File "/usr/bin/rhnget", line 367, in main
    mirrorrhn(op.uri, op.destination)
  File "/usr/bin/rhnget", line 329, in mirrorrhn
    raise(MirrorException('Unknown error that needs more debugging occured with channel %s. Skipping.\n%s' % (label, e)))
__main__.MirrorException: "Unknown error that needs more debugging occured with channel rhel-x86_64-as-4-extras. Skipping.\n'up2date'"
yam: Mirroring failed for rhns://xmlrpc.rhn.redhat.com/rhel-x86_64-as-4-extras with message:
  Failed with return code: 256
Traceback (most recent call last):
  File "/usr/bin/rhnget", line 386, in ?
    main()
  File "/usr/bin/rhnget", line 367, in main
    mirrorrhn(op.uri, op.destination)
  File "/usr/bin/rhnget", line 329, in mirrorrhn
    raise(MirrorException('Unknown error that needs more debugging occured with channel %s. Skipping.\n%s' % (label, e)))
__main__.MirrorException: "Unknown error that needs more debugging occured with channel rhel-x86_64-as-4-fastrack. Skipping.\n'up2date'"
yam: Mirroring failed for rhns://xmlrpc.rhn.redhat.com/rhel-x86_64-as-4-fastrack with message:
  Failed with return code: 256
Traceback (most recent call last):
  File "/usr/bin/rhnget", line 386, in ?
    main()
  File "/usr/bin/rhnget", line 367, in main
    mirrorrhn(op.uri, op.destination)
  File "/usr/bin/rhnget", line 329, in mirrorrhn
    raise(MirrorException('Unknown error that needs more debugging occured with channel %s. Skipping.\n%s' % (label, e)))
__main__.MirrorException: "Unknown error that needs more debugging occured with channel rhel-x86_64-as-4. Skipping.\n'up2date'"
yam: Mirroring failed for rhns://xmlrpc.rhn.redhat.com/rhel-x86_64-as-4 with message:
  Failed with return code: 256