i am running a ejb3 aplication on jboss 4.2.0. It worked fine, but i've added new entities unreleated with the old ones and it raises next exception. Can anyone help me? 11:58:35,632 WARN [JDBCExceptionReporter] SQL Error: 208, SQLState: 42S02 11:58:35,632 ERROR [JDBCExceptionReporter] [Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]El nombre de objeto 'usuario_concesion' no es válido. 11:58:35,632 WARN [JDBCExceptionReporter] SQL Error: 16945, SQLState: HY000 11:58:35,632 ERROR [JDBCExceptionReporter] [Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]El cursor no ha sido declarado. 12:01:41,798 WARN [arjLoggerI18N] [com.arjuna.ats.arjuna.coordinator.BasicAction_58] - Abort of action id -3f57df8d:759:4682264b:cf invoked while multiple threads active within it. 12:01:41,798 WARN [arjLoggerI18N] [com.arjuna.ats.arjuna.coordinator.CheckedAction_2] - CheckedAction::check - atomic action -3f57df8d:759:4682264b:cf aborting with 1 threads active! 12:45:44,181 ERROR [LazyInitializationException] failed to lazily initialize a collection of role: com.satdatatelecom.satdataweb.model.usuario.ejb.UsuarioEJB.concesiones, no session or session was closed org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.satdatatelecom.satdataweb.model.usuario.ejb.UsuarioEJB.concesiones, no session or session was closed at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358) at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350) at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:343) at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86) at org.hibernate.collection.PersistentBag.toString(PersistentBag.java:483) at com.satdatatelecom.satdataweb.model.usuariofachada.ejb.actions.finders.FindUsuarioAction.execute(FindUsuarioAction.java:31) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4058075#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...