bdb_equality_candidates: index_param failed

["Herbert G. Fischer" <hgfischer@trama.com>]

Hi,

I'm new to the list.
I'm using OpenLDAP with Jamm (jamm.sf.net)
to do a virtual domains mail server and it's
apparently working well, but this message on
the syslog is bothering me.

Feb 20 18:45:19 corpmail slapd[21456]: conn=7502 op=1 SRCH
base="o=corpmail,dc=trama,dc=com,dc=br" scope=2
filter="(&(&(objectClass=JammMailAlias)(mail=hgfischer@trama.com))(accountAc
tive=TRUE))"
Feb 20 18:45:19 corpmail slapd[21456]: <= bdb_equality_candidates:
index_param failed (18)
Feb 20 18:45:19 corpmail slapd[21456]: conn=7502 op=1 SEARCH RESULT tag=101
err=0 nentries=0 text=

the "error" is "<= bdb_equality_candidates: index_param failed (18) "

What does this means??? What can I do to solve this problem???

Thanks!

Herbert