Hi I am using the statefulknowledgesession with jpa persistence with spring...exactly configured as per in the section : Example 2.5. JPA configuration for StatefulKnowledgeSessions http://downloads.jboss.com/drools/docs/5.1.1.34858.FINAL/drools-introduct... I am using, spring 3.0.3 release, hibernate 3.5.1, drools 5.1.1. Spring is closing the entity manager upon invoking ksession.startProcess() and got the exception "EntityManager is closed" , actually in drools, the class org.drools.persistence.processinstance.persisters.JPAVariablePersister is using entitymanager from cmd_scoped_entity_manager ( in my case, it is org.hibernate.ejb.EntityManagerImpl) but this is being closed by spring aop transaction surrounded on my calling method for ksession.startProcess(). Any help would be appreciated... thx I attached the complete stack trace of the exception in this message. http://drools-java-rules-engine.46999.n3.nabble.com/file/n1475301/excepti... exception.txt -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/EntityManager-is-clos... Sent from the Drools - User mailing list archive at Nabble.com.