anonymous wrote : Note that we are using trans atrribute NOT_SUPPORTED because we want the procedure to control the transaction. Actually the transaction can never be controlled by the procedure as they are either controlled through the connection objects or by container. You could be hitting this jira https://jira.jboss.org/jira/browse/JBAS-5801 Can you port the application to the Jboss4.3 series and see if you still hit the same error? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4204626#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...