additional info: no structural object class provided

[Matthijs Mohlmann <matthijs@active2.homelinux.org>]

That's the error when i tried to add a entry

My ldiff file looks:

# Users in de LDAP database.
dn: uid=matthijs,ou=users,dc=active2,dc=homelinux,dc=org
objectClass: krb5Principal
objectClass: posixAccount
cn: Matthijs Mohlmann
krb5PrincipalName: matthijs@ACTIVE2.HOMELINUX.ORG
uidNumber: 1003
gidNumber: 100
uid: matthijs
description: users
userPassword: {KERBEROS}matthijs@ACTIVE2.HOMELINUX.ORG
homeDirectory: /home/users/matthijs
loginShell: /bin/bash

if you can see at the userPassword attribute i have a Kerberos server to
authenticate myself and the users.

But when i try to add a entry then happens this:
Server:~/ldapusers# ldapadd -f entries.ldiff -D
"cn=admin,dc=active2,dc=homelinux.org,dc=org" -W
Enter LDAP Password:
SASL/GSSAPI authentication started
SASL username: admin@ACTIVE2.HOMELINUX.ORG
SASL SSF: 56
SASL installing layers
adding new entry "uid=matthijs,ou=users,dc=active2,dc=homelinux,dc=org"
ldapadd: update failed:
uid=matthijs,ou=users,dc=active2,dc=homelinux,dc=org
ldap_add: Object class violation (65)
        additional info: no structural object class provided

When i add the following entry to entries.ldiff:
krb5PrincipalRealm: ACTIVE2.HOMELINUX.ORG

Then i get the following error:

Server:~/ldapusers# ldapadd -f entries.ldiff -D
"cn=admin,dc=active2,dc=homelinux.org,dc=org" -W
Enter LDAP Password:
SASL/GSSAPI authentication started
SASL username: admin@ACTIVE2.HOMELINUX.ORG
SASL SSF: 56
SASL installing layers
adding new entry "uid=matthijs,ou=users,dc=active2,dc=homelinux,dc=org"
ldapadd: update failed:
uid=matthijs,ou=users,dc=active2,dc=homelinux,dc=org
ldap_add: Invalid syntax (21)
        additional info: krb5PrincipalRealm: value #0 invalid per syntax

I've checked the openldap-software mailing lists and get one result but
i don't know what it means.

http://www.openldap.org/lists/openldap-software/200306/msg00293.html

Maybe you can help me ?

(This is my first time i setup a OpenLDAP server)