[unixODBC][Driver Manager]Data source name not found, and no default driver

Hi,

I am trying to start LDAP 2.3.32 with MySQL as backend. I am using unixODBC. When I start slapd it reports -

============================================ backsql_open_db_conn(4294967295): SQLConnect() to database "test" failed. Return code: -1 nativeErrCode=0 SQLengineState=IM002 msg="[unixODBC][Driver Manager]Data source name not found, and no default driver specified" backsql_get_db_conn(): could not get connection handle -- returning NULL ============================================

With strace, I can see that its opening odbc.ini but no reference to odbcinst.ini, why so?