It's true that my persistence.xml doesn't include the xsd definition: <persistence> | <persistence-unit name="mpee_client_soap"> | <jta-data-source>java:mpee_DS</jta-data-source> | <class>com.telrock.platform.vo.PropertiesVO</class> | <properties> | <property name="hibernate.show_sql" value="false"/> | </properties> | </persistence-unit> | </persistence> But I changed it to: <persistence | xmlns="http://java.sun.com/xml/ns/persistence" | xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" | version="1.0"> | | <persistence-unit name="mpee_client_soap"> | <jta-data-source>java:mpee_DS</jta-data-source> | <class>com.telrock.platform.vo.PropertiesVO</class> | <properties> | <property name="hibernate.show_sql" value="false"/> | </properties> | </persistence-unit> | </persistence> and get the same problem. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4162002#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...