Hello: i'm trying to put together a working Seam example showing a OneToMany relationship using a composite primary key. Something like Order & LineItems from the Java EE 5 tutorial. My attempts have been unsuccessful so I'm hoping someone can tell me where I can find a Seam deployable example that actually works. I have tried the Java EE 5 tutorial code (\javaeetutorial5\examples\ejb\order) and it fails with the following (against an Oracle database): 20:56:11,991 INFO [STDOUT] Hibernate: insert into EJB_ORDER_ORDER (status, lastUpdate, discount, shipmentInfo, orderId) values (?, ?, ?, ?, ?) | 20:56:12,084 INFO [STDOUT] Hibernate: insert into EJB_ORDER_LINEITEM (ORDERID, VENDORPARTNUMBER, quantity, orderId, itemId) values (?, ?, ?, ?, ?) | 20:56:12,240 WARN [JDBCExceptionReporter] SQL Error: 957, SQLState: 42000 | 20:56:12,240 ERROR [JDBCExceptionReporter] ORA-00957: duplicate column name | | 20:56:12,240 WARN [JDBCExceptionReporter] SQL Error: 957, SQLState: 42000 | 20:56:12,240 ERROR [JDBCExceptionReporter] ORA-00957: duplicate column name | | 20:56:12,240 ERROR [AbstractFlushingEventListener] Could not synchronize database state with session | org.hibernate.exception.SQLGrammarException: Could not execute JDBC batch update | at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:67) | at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) | at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:249) | at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:235) Notice that orderId is listed twice in the second insert statement above?? The code is available here: http://java.sun.com/javaee/5/docs/tutorial/information/download.html Please help! I really want to use Seam. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4041606#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...