Hello, searched for information but did not success... When i deploy my EJB3 application, JBoss 4.0.5 GA + RC9 patch says: anonymous wrote : 11:58:37,109 WARN [Ejb3Configuration] Persistence provider caller does not implements the EJB3 spec correctly | . PersistenceUnitInfo.getNewTempClassLoader() is null. | 11:58:37,140 WARN [ServiceController] Problem starting service persistence.units:ear=Ejb3Test.ear,unitName=Ej | b3PU | javax.persistence.PersistenceException: [PersistenceUnit: Ejb3PU] class or package not found | at org.hibernate.ejb.Ejb3Configuration.addNamedAnnotatedClasses(Ejb3Configuration.java:1067) and later anonymous wrote : | --- MBeans waiting for other MBeans --- | ObjectName: persistence.units:ear=Ejb3Test.ear,unitName=Ejb3PU | State: FAILED | Reason: javax.persistence.PersistenceException: [PersistenceUnit: Ejb3PU] class or package not found | I Depend On: | jboss.jca:service=DataSourceBinding,name=Ejb3DS | | --- MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM --- | ObjectName: persistence.units:ear=Ejb3Test.ear,unitName=Ejb3PU | State: FAILED | Reason: javax.persistence.PersistenceException: [PersistenceUnit: Ejb3PU] class or package not found | I Depend On: | jboss.jca:service=DataSourceBinding,name=Ejb3DS | But the DataSource is ok. And the source code too, as far as i can see. Worked for 2 days now on that problem. Any suggestions please? Thx very much!!! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4008739#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...