anonymous wrote : HERE ARE THE CONSOLE OUTLINE WHEN I DEPLOY THE APPLICATION: | 17:50:41,517 INFO [JmxKernelAbstraction] persistence.units:ear=surgeonfish.ear,jar=surgeonfish.jar,unitName=time_report_persistence_context | 17:50:41,532 INFO [EJBContainer] STARTED EJB: com.atosorigin.utils.pojo.PrStaffHome ejbName: PrStaffHome This line shows that the EJB has been properly deployed with the Entity manager dependency resolved. anonymous wrote : WHEN I TRY IT I AM TAKING ERROR: | ------------------------------------------------------------------------------ | 17:55:56,935 WARN [ExplodedJarVisitor] Exploded jar does not exists (ignored): file:../surgeonfish.jar | 17:55:56,935 INFO [AnnotationBinder] Binding entity from annotated class: com.atosorigin.utils.pojo.PrGroups | 17:55:56,951 INFO [EntityBinder] Bind entity com.atosorigin.utils.pojo.PrGroups on table pr_groups | 17:55:56,951 INFO [AnnotationBinder] Binding entity from annotated class: com.atosorigin.utils.pojo.PrStaff | 17:55:56,951 INFO [EntityBinder] Bind entity com.atosorigin.utils.pojo.PrStaff on table pr_staff However this part of the log is strange. I don't know why the application/entities are being "redeployed" when you are accessing your application. What exactly do you do in this step? I mean how do you invoke the application? For some reason, the application is getting redeployed. I see the following commented out portion in the EJB that you posted. Are you sure the class file that has been deployed also has this part commented? anonymous wrote : | /* | EntityManagerFactory emf = Persistence.createEntityManagerFactory("time_report_persistence_context"); | EntityManager em = emf.createEntityManager(); | PrStaff instance1 = em.find(PrStaff.class, id); | ---this lines working without any error...--- | */ View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4158912#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...