Hi Wolfgang, I have tried exactly what u have said. but stll i am getting same exception. For time being i used two methods. In First method i am removing all its associated entties like buyerrating,vendorrating,skills,bids. In second method simply removing project object. But this approch pushing me to go database twice. i want to prform this in a single method. Any suggessions Thanks K.Ramu View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211020#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...