I'm stuck and please need help on this. I've used JDeveloper 10.1.3.3 to develop an app using TopLink. It works fine with the embedded OC4J. When deploying it on JBoss 4.2.2 I get the following error: Cannot acquire data source [jdbc/MYDBDS] javax.naming.InvalidNameException: Not a compound name: jdbc/MYDBDS oracle.toplink.jndi.JNDIConnector.connect(JNDIConnector.java:100) Here is the code that tries to establish the connection: loader = new XMLSessionConfigLoader("META-INF/sessions.xml"); mgr = SessionManager.getManager(); session = (DatabaseSession)mgr.getSession( loader, "default", Thread.currentThread().getContextClassLoader()); Here is the session.xml file extract: jdbc/MYDBDS <platform-class>oracle.toplink.platform.database.MySQL4Platform</platform-class> Here is the mysql-dq.xml (JBoss DS def) extract: <local-tx-datasource> <jndi-name>MYDBDS</jndi-name> I have tried various combinations of changing the toplink session and JBoss data source: java:comp/env/jdbc/MYDBDS comp/env/jdbc/MYDBDS env/jdbc/MYDBDS jdbc/MYDBDS MYDBDS I have also tried the solution described in this discussion: http://forums.oracle.com/forums/message.jspa?messageID=1056712 It works getting by the JNDI lookup issue, but then I hit another error (can't get the session to load descriptors from a specific xml). Please help me. Henkie View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4168056#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...