[Mailman-Users] check-perms error

[jiangds]

Hi list,

I got a error when I run the ./check_perms 

Traceback (most recent call last):
    File "./check_perms", line51, in ?
        MAILMAN_GID = grp.getgrnam(MAILMAN_GROUP)[2]
KeyError: getgrnam(): name not found

How can I deel with it?