[Mailman-Users] Errors in cron/nightly_gzip ?

[Ben Lovett]

Hello, I received the following message from my machine, and, not being a
python guru myself, I can not even try to dig into what is happening here. 
Could somebody give me some insight as to what is happening, and how I may
go about fixing it?

Thank you ;)
-Ben

-=- Begin error message -=-
Traceback (innermost last):
  File "/usr/local/mailman/cron/nightly_gzip", line 143, in ?
    main()
  File "/usr/local/mailman/cron/nightly_gzip", line 114, in main
    time.strptime(f, '%Y-%B.txt')
AttributeError: strptime
-=- End error message -=-