I am trying to undeploy processdefinition from oracle database by using jbpm api. but it is throughing error. these are follows code: JbpmConfiguration jbpmConfiguration = JbpmConfiguration.getInstance(); JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext(); try { ProcessDefinition processDefinition = jbpmContext.getGraphSession().findLatestProcessDefinition(processDefn.getName()); jbpmContext.getGraphSession().deleteProcessDefinition(processDefinition); }finally { jbpmContext.close(); } error: 12:48:23,799 WARN [JDBCExceptionReporter] SQL Error: 904, SQLState: 42000 12:48:23,799 ERROR [JDBCExceptionReporter] ORA-00904: "TEMPLATESE0_"."ID_": inva lid identifier 12:48:23,831 ERROR [STDERR] org.hibernate.exception.SQLGrammarException: could n ot initialize a collection: [org.jbpm.taskmgmt.def.Task.templateSet#1662789] at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.j ava:65) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelp er.java:43) at org.hibernate.loader.Loader.loadCollection(Loader.java:1926) at org.hibernate.loader.collection.CollectionLoader.initialize(Collectio nLoader.java:71) at org.hibernate.persister.collection.AbstractCollectionPersister.initia lize(AbstractCollectionPersister.java:520) at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onIn itializeCollection(DefaultInitializeCollectionEventListener.java:60) at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java: 1627) at org.hibernate.collection.AbstractPersistentCollection.initialize(Abst ractPersistentCollection.java:344) at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPe rsistentCollection.java:86) at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:13 8) at org.hibernate.type.CollectionType.getElementsIterator(CollectionType. java:196) at org.hibernate.type.CollectionType.getElementsIterator(CollectionType. java:188) at org.hibernate.engine.CascadingAction.getAllElementsIterator(Cascading Action.java:266) at org.hibernate.engine.CascadingAction.access$100(CascadingAction.java: 21) at org.hibernate.engine.CascadingAction$2.getCascadableChildrenIterator( CascadingAction.java:52) at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:2 88) at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:185) at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:160) at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:108) at org.hibernate.engine.Cascade.cascade(Cascade.java:248) at org.hibernate.engine.Cascade.cascade(Cascade.java:223) at org.hibernate.event.def.DefaultDeleteEventListener.cascadeBeforeDelet e(DefaultDeleteEventListener.java:220) at org.hibernate.event.def.DefaultDeleteEventListener.deleteEntity(Defau ltDeleteEventListener.java:169) at org.hibernate.event.def.DefaultDeleteEventListener.onDelete(DefaultDe leteEventListener.java:110) at org.hibernate.impl.SessionImpl.fireDelete(SessionImpl.java:764) at org.hibernate.impl.SessionImpl.delete(SessionImpl.java:757) at org.hibernate.engine.CascadingAction$2.cascade(CascadingAction.java:4 7) at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:213) at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:157) at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:108) at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:2 90) i have checked so many messages about this topic e.g. http://www.jboss.com/index.html?module=bb&op=viewtopic&t=78471 http://www.jboss.com/index.html?module=bb&op=viewtopic&t=82667 i have tried to delete processinstance before processdefinition code: jbpmContext.getGraphSession().deleteProcessInstance(pi); but still i am not able to undeploy if someone who has encountered this problem can u plz help me out regarding this. thanks in advance View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4022891#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...