[Mailman] Cron <mailman at hep> /usr/lib/mailman/cron/nightly_gzip

[Cron Daemon]

Traceback (most recent call last):
  File "/usr/lib/mailman/cron/nightly_gzip", line 154, in ?
    main()
  File "/usr/lib/mailman/cron/nightly_gzip", line 106, in main
    listnames = Utils.list_names()
  File "/usr/lib/mailman/Mailman/Utils.py", line 96, in list_names
    return Site.get_listnames()
  File "/usr/lib/mailman/Mailman/Site.py", line 110, in get_listnames
    for fn in os.listdir(mm_cfg.LIST_DATA_DIR):
OSError: [Errno 2] No such file or directory: '/var/lib/mailman/lists'