I checked in the oracle documentation and I have found this type of error occured when one writes DDL statement in a transation. The DDL statement is auto commit. But I have not written any DDL statement in my distributed trasaaction. I have simply updating two tables using Entity bean. Coud you please help me to know what could be the possible cause of the problem. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4183247#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...