Hi, I use Spring to build the session factory with my custom object mappings and JBPM object mappings. In the bean configuration I set a configLocation to a mappingJBPM.cfg.xml file which is a copy og the hibernate.cfg.xml in the distribution (3.2.1) without datasource properties and the Script.hbm.xml line removed. But I got an exception from the hibernate binder : Caused by: org.hibernate.MappingException: An association from the table JBPM_NODE refers to an unmapped class: org.jbpm.graph.action.Script If I add the mapping for the Script class it works. And I got the exception evedn if the database is not created. Matthieu View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4077191#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...