Hi, I am now running jbpm-jpdl-3.2.GA to check out mail jpdl functionality for events, I designed a simple processDefinition in the eclipse plugin, and deployed, only to get the following exception.. can anyone provide a solution to this? 13:56:09,712 DEBUG [DbPersistenceService] committing hibernate transaction 13:56:09,720 ERROR [DbPersistenceService] hibernate commit failed org.hibernate.HibernateException: instance not of expected entity type: org.jbpm.graph.action.MailAction is not a: org.jbpm.graph.def.Action at org.hibernate.persister.entity.AbstractEntityPersister.getSubclassEntityPersister(AbstractEntityPersister.java:3412) at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1340) at org.hibernate.engine.ForeignKeys.isTransient(ForeignKeys.java:180) at org.hibernate.event.def.AbstractSaveEventListener.getEntityState(AbstractSaveEventListener.java:487) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:84) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70) your help is appreciated, regards, Ross View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4062954#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...