User development, A new message was posted in the thread "jbpm 4.3 - org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update": http://community.jboss.org/message/523238#523238 Author : Ronald van Kuijk Profile : http://community.jboss.org/people/kukeltje Message: -------------------------------------------------------------- Well, from what I could determine from the different configs is: (and this does not yield any more new info for me) - use JTA if you want jBPM to participate fully in JTA - use 'normal' if you want to just have jdbc transactions.   In the first case do not forget to configure           <property name="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</property>         <property name="hibernate.transaction.manager_lookup_class">org.hibernate.transaction.JBossTransactionManagerLookup</property>         <property name="jta.UserTransaction">UserTransaction</property>   correctly in your hibernate config specific for your server. That is all I can find out without digging to much in. Does this shed new light on it for you or doesn't it? (I think the latter) -------------------------------------------------------------- To reply to this message visit the message page: http://community.jboss.org/message/523238#523238