hi all, i had already problem like this and my mistake was that i hadn't unitname in the persistance.xml file i think if u must add this in u your persistance.xml | <persistence-unit name="Blah1" transaction-type="JTA"> | <jta-data-source>java:/XAOracleDS</jta-data-source> | <class>com.magti.businesslayer.ejb3entity.oracle.Test</class> | <properties> | [props] | </properties> | </persistence-unit> | | in second persistanc.xml | <persistence-unit name="Blah2" transaction-type="JTA"> | <jta-data-source>java:/XAOracleDS</jta-data-source> | <class>com.magti.businesslayer.ejb3entity.oracle.Test</class> | <properties> | [props] | </properties> | </persistence-unit> | | u also could put more then one persistance unit in one persistance.xml file | <persistence-unit name="Blah1" transaction-type="JTA"> | <jta-data-source>java:/XAOracleDS</jta-data-source> | <class>com.magti.businesslayer.ejb3entity.oracle.Test</class> | <properties> | [props] | </properties> | </persistence-unit> | <persistence-unit name="Blah2" transaction-type="JTA"> | <jta-data-source>java:/XAOracleDS</jta-data-source> | <class>com.magti.businesslayer.ejb3entity.oracle.Test</class> | <properties> | [props] | </properties> | </persistence-unit> | | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3964849#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...