(ITS#6065) slapcat with sql (postgres) backend

[frederic.bouy@gmail.com]

Full_Name: Frederic Bouy
Version: 2.4.12
OS: Linux
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (81.255.106.203)


When running the following command:
slapcat -l /tmp/lnp.ldif -f /usr/local/openldap/etc/openldap/slapd.conf -d 1
I get this error message:
<==backsql_load_schema_map()
==>backsql_free_db_conn()
==>backsql_close_db_handle(0x8290c18)
<==backsql_close_db_handle(0x8290c18)
<==backsql_free_db_conn()
<==backsql_db_open(): test succeeded, schema map loaded
slapcat: database doesn't support necessary operations.

ldapsearch is successfull.

Do you have any clue on how to solve this issue?
Thanks for your help.