Rocker, are you missing db id generator in your jbpm.cfg.xml file? | <object class="org.jbpm.pvm.internal.id.DatabaseDbidGenerator"> | <field name="commandService"><ref object="txRequiredCommandService" /></field> | </object> | | <object class="org.jbpm.pvm.internal.id.DatabaseIdComposer" init="eager" /> | You need to remove any id-generator component also if present. This is something new in 4.2. Also what I understand is you do not need to mention "hibernate-configuration" in jbpm.cfg.xml since you are already giving them in spring configuration. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4266443#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...