I tried both ldapmodify and ldapadd (with a couple of different ldifs). I was trying to "add" an attribute(s) (olcTLSCertificateFile; olcCipherSuite & olcCertificateKeyFile) to the cn=config. No matter what I tried to do, it either returned the error indicated on the original email or it killed the slapd daemon. In the past, yes I know it is not the correct way, I had to stop slapd change into the cn=config directory and manually enter what I wanted. Then restart.
Your syntax is clearly wrong. Again, "changetype: add" is incorrect for modifying an existing entry. You need to use "changetype: modify"
There's a clear example of how to add attributes to an existing entry using "changetype: modify" in <http://en.wikipedia.org/wiki/LDAP_Data_Interchange_Format>
--Quanah -- Quanah Gibson-Mount Architect - Server Zimbra, Inc. -------------------- Zimbra :: the leader in open source messaging and collaboration