Gary tse [http://community.jboss.org/people/garytse] created the discussion "Re: Instantiating workflow from EJB deployed as part of .ear : javax.persistence.PersistenceException: [PersistenceUnit: org.jbpm.persistence.jpa] Unable to build EntityManagerFactory" To view the discussion, visit: http://community.jboss.org/message/619544#619544 -------------------------------------------------------------- Try using JBossTransactionManagerLookup... not sure why you have it commented out. <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup" /> Next, set this to validate if the tables are already created previously : <property name="hibernate.hbm2ddl.auto" value="validate" /> Good luck -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/619544#619544] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]