Illegal specification for a user or group attribute

When creating or modifying users and groups, these conditions will cause an error:

• a colon (:) or newline character in any attribute (including user name, home directory, comment)

• a misspelled or nonexistent login shell (or path name)

• an illegal user or group name (names cannot begin with a number or exceed 8 characters in length)

• an illegal UID or GID number (they must fall within the minimum and maximum values listed in the User or Group selections of the Options menu in the Account Manager)