Hi Priyesh, The back-ndb backend is entirely experimental (as noted in the manpage) and the work on it was never completed. It should not be used nor should it be expected to work. Hope that helps! This ITS will be closed. Regards, Quanah -- Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: <http://www.symas.com>