I'm a persistence/EJB 3 newbie having difficulties initializing my EntityManagerFactory. The error I'm getting is the infamous "No Persistence provider for Entity Manager ".... Here is my setup: * JBoss 4.0.3SP1 * PostgreSQL 8.2.4 * Hibernate persistence * Deployed EAR: vram.ear | | | -- vram-ejbs.jar | | | -- hibernate.properties | -- META-INF/persistence.xml * persistence.xml <persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0"> | <persistence-unit name="vramPu"> | <provider>org.hibernate.ejb.HibernatePersistence</provider> | <jta-data-source>java:/nicweb/DataSource</jta-data-source> | </persistence-unit> | <properties> | <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/> | <property name="hibernate.show_sql" value="true"/> | </properties> | </persistence> * hibernate.properties hibernate.dialect org.hibernate.dialect.PostgreSQLDialect hibernate.connection.driver_class org.postgresql.Driver hibernate.connection.url jdbc:postgresql://localhost/nicweb hibernate.connection.username nicweb-admin hibernate.connection.password nicweb-admin * EJB Stateless Session Bean @Stateless | public class MyClass implements MyClassRemote { | | @PersistenceContext | private EntityManager em; | | @PersistenceUnit | private EntityManagerFactor emf; | | ... | | /* Error thrown at this call... */ | emf = Persistence.createEntityManagerFactory("vramPu"); | em = emf.createEntityManager(); I think the Persistence API is able to locate the persistence.xml file, and the hibernate.properties is loaded (but not sure if needed). Any help is greatly appreciated. Regards, Mike View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4102685#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...