I launch a method on application startup using the org.jboss.seam.postInitialization event. It work fine except if I access the database (and I need to) : using seam managed entity manager : @In | private EntityManager em; | | @Observer("org.jboss.seam.postInitialization") | private void setupAFewThings() throws ComentSystemException { | MyObject w = new MyObject() ; | w.setName("test_name") ; | em.getTransaction().begin(); | em.persist(w) ; | em.getTransaction().commit(); | } or manually creating a new entity manager like this : @Observer("org.jboss.seam.postInitialization") | private void setupAFewThings() throws ComentSystemException { | MyObject w = new MyObject() ; | w.setName("test_name") ; | EntityManagerFactory emf = Persistence.createEntityManagerFactory("myDatabase"); | EntityManager em = emf.createEntityManager(); | em.getTransaction().begin(); | em.persist(w) ; | em.getTransaction().commit(); | } I get the same error ("java.lang.IllegalStateException: JTA EntityManager cannot access a transactions") : anonymous wrote : 16:26:18,530 ERROR [[/coment_demo]] Exception lors de l'envoi de l'évènement contexte initialisé (context initialized) à l'instance de classe d'écoute (listener) org.jboss.seam.servlet.SeamListener | java.lang.IllegalStateException: JTA EntityManager cannot access a transactions | at org.hibernate.ejb.AbstractEntityManagerImpl.getTransaction(AbstractEntityManagerImpl.java:316) | at com.sopinspace.coment.core.WorkflowManager.addDefaultWorkflow(WorkflowManager.java:53) | at com.sopinspace.coment.core.WorkflowManager.create(WorkflowManager.java:62) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:585) | at org.jboss.seam.util.Reflections.invoke(Reflections.java:21) | at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31) Any help ? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4081692#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...