Here is the exception that gets thrown when trying to save processInstance with RunrimeActions: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: org.jbpm.graph.def.Action | at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:219) | at org.hibernate.type.EntityType.getIdentifier(EntityType.java:397) | at org.hibernate.type.ManyToOneType.isDirty(ManyToOneType.java:242) | at org.hibernate.type.TypeFactory.findDirty(TypeFactory.java:597) | at org.hibernate.persister.entity.AbstractEntityPersister.findDirty(AbstractEntityPersister.java:3123) | at org.hibernate.event.def.DefaultFlushEntityEventListener.dirtyCheck(DefaultFlushEntityEventListener.java:479) | at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:204) | at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:127) | at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:196) | at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76) | at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26) | at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000) | at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338) | at org.hibernate.transaction.CacheSynchronization.beforeCompletion(CacheSynchronization.java:59) | at com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.beforeCompletion(SynchronizationImple.java:114) | at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.beforeCompletion(TwoPhaseCoordinator.java:247) | at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:86) | at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:177) | at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1389) | ... I've solved this by adding cascade="all" attribute into RuntimeAction.hbm.xml <many-to-one name="action" cascade="all"column="ACTION_" | foreign-key="FK_RTACTN_ACTION" | index="IDX_RTACTN_ACTION" /> Is it a bug in JBPM? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4125210#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...