Hi, what about something like this: | catch(Exception e) | { | if (e.getCause() instanceof ConstraintViolationException) | { | ... | } | else if (e.getCause() instanceof LockAcquisitionException) | { | ... | } | | //Maybe also check e.getCause().getCause() and so on! | } Hope this helps Wolfgang View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4264795#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...