group migration to Ldap

I'm tyring to migrate my /etc/group to openldap. I've used the migration tools, but for some reason, I get the following when trying to do the ldapadd for the group.ldif generated .

adding new entry "cn=at,ou=Group,dc=zlinux,dc=hiw,dc=com" ldap_add: Object class violation (65) additional info: no structural object class provided

Not sure why, as the /etc/passwd migrated just fine.

Steve Francis Technical Advisor - zSeries, zLinux, z/OS IHG Alpharetta Data Center Ph: 770-442-7157 Cell: 770-906-3122 IM: francisihg