Hi Soumitra, Thanks for your timely response. >>This may be due to several reason , so you have to remove that conflict first . Could you suggest me a way to do it. I am unable to figure out why this data integrity came into picture(like why it is failing). In order to reduce this what are measures to cope with?? Thanks in Advance. Regards, Pavan -- Sent from: http://www.postgresql-archive.org/PostgreSQL-admin-f2076596.html