User development, A new message was posted in the thread "Problem retrieving running process instance": http://community.jboss.org/message/518950#518950 Author : Oliver Schneider Profile : http://community.jboss.org/people/Masipulami Message: -------------------------------------------------------------- In the meantime I found the cause of the problem:   I had to comment out the following line of file jbpm.hibernate.xfg.xml: <!-- property name="hibernate.hbm2ddl.auto">create-drop</property--> -------------------------------------------------------------- To reply to this message visit the message page: http://community.jboss.org/message/518950#518950