jhalliday: Sorry about the late response. I added the following to jbossjta-properties.xml <property name="com.arjuna.ats.jta.allowMultipleLastResources" value="true"/> as the first child element of <properties depends="arjuna" name="jta"> which I assume is the correct place (the documentation does not say exactly where). The DeploymentException I get occurs at JBoss startup, as the transaction manager is started. Dave View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4055891#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...