User development, A new message was posted in the thread "null pointer exception when integrating jbpm4.3,spring2.5.6,hibernate3": http://community.jboss.org/message/530484#530484 Author : Michael Wohlfart Profile : http://community.jboss.org/people/mwohlf Message: -------------------------------------------------------------- this is a hibernate mapping issue:   [...] Caused by: org.hibernate.MappingException: Unknown entity:  org.jbpm.pvm.internal.id.PropertyImpl      at  org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:580) [...]   the mapping for org.jbpm.pvm.internal.id.PropertyImpl is in jbpm.repository.hbm.xml  there should be a table JBPM4_PROPERTY in your database schema, maybe it helps to use "create" instead of "update" for hibernate.hbm2ddl.auto or you could manually create the schema like documented at http://www.mastertheboss.com/en/jbpm/209-jbpm-4-tutorial-installation.html   to me it looks like there is something wrong with your hibernate mapping config -------------------------------------------------------------- To reply to this message visit the message page: http://community.jboss.org/message/530484#530484