bdb_equality_candidates: (attr) index_param failed (18) ?

["Carl Litt" <carl@execulink.com>]

Hi all,

I am getting the following error from OpenLDAP 2.1.18 anytime I search
on attributes from my schema:

May 13 00:13:21 ldap1 slapd[2140]: conn=1 op=3 SRCH
base="ou=servicetypes,o=top" scope=2 filter="(serviceType=SOME-TYPE)"
...
May 13 00:13:21 ldap1 slapd[2140]: <= bdb_equality_candidates: id=0,
first=0, last=0
May 13 00:13:21 ldap1 slapd[2140]: <= bdb_filter_candidates: id=0
first=0 last=0
May 13 00:13:21 ldap1 slapd[2140]: => bdb_filter_candidates
May 13 00:13:21 ldap1 slapd[2140]: ^IEQUALITY
May 13 00:13:21 ldap1 slapd[2140]: => bdb_equality_candidates
(serviceType)
May 13 00:13:21 ldap1 slapd[2140]: <= bdb_equality_candidates:
(serviceType) index_param failed (18)
May 13 00:13:21 ldap1 slapd[2140]: <= bdb_filter_candidates: id=0
first=0 last=0

Here is the schema definition for serviceType:

attributeType ( 1.3.6.1.4.1.MYOID.....
        NAME 'serviceType'
        EQUALITY caseIgnoreMatch
        SUBSTR caseIgnoreSubstringsMatch
        SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
        )

The search is returning correctly, however I am concerned that this
error is a sign of something wrong.  From what I gather from the source,
bdb_index_param is returning LDAP_INAPPROPRIATE_MATCHING (?).
Further research shows that I get this error on substring searches as
well (bdb_substring_candidates).

Is there something wrong with my schema definition?  This directory was
created by slapadd'ing an LDIF taken from 2.0.27.

Thanks,
Carl Litt
Network Administrator
Execulink Internet