Stefano Campanini [http://community.jboss.org/people/campa] replied to the discussion "JBPM 4.3 - org.jbpm.api.JbpmException: couldn't acquire block of ids" To view the discussion, visit: http://community.jboss.org/message/539140#539140 -------------------------------------------------------------- Thank guys for immediate suppprt ... http://community.jboss.org/people/swiderski.maciej Maciej waht kinf of logs of Hibernate I need to activate to help you help me :-)  ? I'm investigating ... I found that in AcquireDbidBlockCmd property object result from the query obtained from the code reported below is null . public Long execute(Environment environment) throws Exception {     Session session = environment.get(Session.class);         PropertyImpl property = (PropertyImpl) session.createQuery(         "select property " +         "from "+PropertyImpl.class.getName()+" as property " +         "where property.key = '"+PropertyImpl.NEXT_DBID_KEY+"'"     ).uniqueResult(); Here property is null !! My interested configuration is .... <task-service />         <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" /> Is it correct ? How I can debug and understand wich transcations objects are playing and its state ? -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/539140#539140] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]