Hi all, Currently I get the following error message. Does someone knows what goes wrong? Configuration: Regards, Stefan 2009-04-29 15:23:57,968 [server-tomcat-thread-2] ERROR org.jbpm.persistence.db.DbPersistenceService - hibernate flush failed org.hibernate.HibernateException: instance not of expected entity type: org.jbpm.context.exe.variableinstance.UnpersistableInstance is not a: org.jbpm.context.exe.VariableInstance at org.hibernate.persister.entity.AbstractEntityPersister.getSubclassEntityPersister(AbstractEntityPersister.java:3663) at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1374) at org.hibernate.engine.ForeignKeys.isTransient(ForeignKeys.java:203) at org.hibernate.event.def.AbstractSaveEventListener.getEntityState(AbstractSaveEventListener.java:535) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:103) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93) at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:534) at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:526) at org.hibernate.engine.CascadingAction$5.cascade(CascadingAction.java:241) at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:291) at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:239) at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:192) at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:319) at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:265) at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:242) at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:192) at org.hibernate.engine.Cascade.cascade(Cascade.java:153) …… 2009-04-29 15:23:57,968 [server-tomcat-thread-2] ERROR org.jbpm.svc.Services - problem closing service 'persistence' org.jbpm.persistence.JbpmPersistenceException: hibernate flush session failed at org.jbpm.persistence.db.DbPersistenceService.close(DbPersistenceService.java:207) at org.jbpm.svc.Services.close(Services.java:243) at org.jbpm.JbpmContext.close(JbpmContext.java:133) ……. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4227527#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...