User development, A new message was posted in the thread "HistoryService": http://community.jboss.org/message/530488#530488 Author : Paolo F Profile : http://community.jboss.org/people/emp.tyres Message: -------------------------------------------------------------- For the record, I found the issue, largely thanks to Maciej's suggestion of looking at the hibernate log, which pointed me in the right direction (tables OK, nothing logged).   I apparently had carried over a jbpm.default.cfg.xml file from an older (4.0?) version, and that version did NOT have the following lines:       <history-sessions>       <object class="org.jbpm.pvm.internal.history.HistorySessionImpl" />     </history-sessions>   This apparently (correctly) causes all calls to the history service to succeed, without anything getting recorded. So, for anyone out there, if you find yourself with getHistoryService().createHistoryProcessInstanceQuery().list() or getHistoryService().createHistoryActivityInstanceQuery().list() returning zero results, I suggest you check your jbpm.default.cfg.xml file.   Bye, Emp -------------------------------------------------------------- To reply to this message visit the message page: http://community.jboss.org/message/530488#530488