Server(2.3.4) startup aborts with (openldap-2.3.4: backend.c:76: Assertion fail) (using sql-back)

[ken Johanson <openldap.ken@onnet.cc>]

Good day,

Wondering if anyones experienced this.. At startup, my server exits with:

openldap-2.3.4: [servers/slapd/]backend.c:76: backend_init_controls: 
Assertion `0' failed.

I'm attempting to use sql-back, and have verified that my odbc 
datasource is working correctly, and my slapd.conf values match the 
datasource also. However being a new user I'm not sure whether this 
might be caused by an invalid setting in slapd.conf:rootdn, etc. Looking 
at the source (my skills are not up to par), it appears that the 'sql' 
type database isn't considered valid.

#A mysql database config:
database        sql
suffix          "cn=com"
rootdn          "cn=exmaple,cn=com"
rootpw          secret
dbname          ldap
dbuser          ldap
dbpasswd        pass
subtree_cond    "ldap_entries.dn LIKE CONCAT('%',?)"
insentry_stmt   "INSERT INTO ldap_entries (dn,oc_map_id,parent,keyval) 
VALUES (?,?,?,?)"
has_ldapinfo_dn_ru      no

Does anyone know what may be causing this?

Thanks in advance,
Ken