I have the jbpm-enterprise.ear deployed in Weblogic 9.2.3. The jndi to the data source is also setup. I wrote a message driven bean to invoke jbpm with the following onMessage() method:

public void onMessage(Message msg) {
 try {
 InitialContext ctx = new InitialContext();

 RemoteCommandServiceHome commandServiceHome =
 (RemoteCommandServiceHome) ctx.lookup("ejb/CommandServiceBean");
 RemoteCommandService commandService = commandServiceHome.create();
 commandService.execute(new NewProcessInstanceCommand("MyProcessDef"));
 }
 catch (NamingException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 catch (RemoteException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 catch (CreateException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 catch (Exception e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 }

However, I got the "Could not instantiate TransactionManagerLookup" error when the message is received:

org.jbpm.JbpmException: couldn't execute org.jbpm.command.NewProcessInstanceCommand@139ed6f
at org.jbpm.ejb.impl.CommandServiceBean.execute(CommandServiceBean.java:92)
at org.jbpm.ejb.impl.CommandServiceBean_jdfmx8_EOImpl.execute(CommandServiceBean_jdfmx8_EOImpl.java:60)
at org.jbpm.ejb.impl.CommandServiceBean_jdfmx8_EOImpl_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.ServerRequest.sendReceive(ServerRequest.java:174)
at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:335)
at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:252)
at org.jbpm.ejb.impl.CommandServiceBean_jdfmx8_EOImpl_923_WLStub.execute(Unknown Source)
at com.pbsg.mst.wf.WFStarterMDB.onMessage(WFStarterMDB.java:48)
at weblogic.ejb.container.internal.MDListener.execute(MDListener.java:429)
at weblogic.ejb.container.internal.MDListener.transactionalOnMessage(MDListener.java:335)
at weblogic.ejb.container.internal.MDListener.onMessage(MDListener.java:291)
at com.ibm.mq.jms.MQMessageConsumer.receiveAsyncQ(MQMessageConsumer.java:2431)
at com.ibm.mq.jms.MQMessageConsumer.receiveAsync(MQMessageConsumer.java:3816)
at com.ibm.mq.jms.SessionAsyncHelper.run(SessionAsyncHelper.java:420)
at java.lang.Thread.run(Thread.java:595)

org.hibernate.HibernateException: Could not instantiate TransactionManagerLookup
at org.hibernate.transaction.TransactionManagerLookupFactory.getTransactionManagerLookup(TransactionManagerLookupFactory.java:47)
at org.hibernate.cfg.SettingsFactory.createTransactionManagerLookup(SettingsFactory.java:418)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:140)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1292)
at org.jbpm.persistence.db.DbPersistenceServiceFactory.getSessionFactory(DbPersistenceServiceFactory.java:91)
at org.jbpm.persistence.db.DbPersistenceService.getSessionFactory(DbPersistenceService.java:95)
at org.jbpm.persistence.db.DbPersistenceService.getSession(DbPersistenceService.java:99)
at org.jbpm.persistence.db.DbPersistenceService.getGraphSession(DbPersistenceService.java:341)
at org.jbpm.JbpmContext.getGraphSession(JbpmContext.java:571)
at org.jbpm.JbpmContext.newProcessInstance(JbpmContext.java:408)
at org.jbpm.command.NewProcessInstanceCommand.execute(NewProcessInstanceCommand.java:74)
at org.jbpm.ejb.impl.CommandServiceBean.execute(CommandServiceBean.java:90)
at org.jbpm.ejb.impl.CommandServiceBean_jdfmx8_EOImpl.execute(CommandServiceBean_jdfmx8_EOImpl.java:60)
at org.jbpm.ejb.impl.CommandServiceBean_jdfmx8_EOImpl_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.ServerRequest.sendReceive(ServerRequest.java:174)
at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:335)
at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:252)
at org.jbpm.ejb.impl.CommandServiceBean_jdfmx8_EOImpl_923_WLStub.execute(Unknown Source)
at com.pbsg.mst.wf.WFStarterMDB.onMessage(WFStarterMDB.java:48)
at weblogic.ejb.container.internal.MDListener.execute(MDListener.java:429)
at weblogic.ejb.container.internal.MDListener.transactionalOnMessage(MDListener.java:335)
at weblogic.ejb.container.internal.MDListener.onMessage(MDListener.java:291)
at com.ibm.mq.jms.MQMessageConsumer.receiveAsyncQ(MQMessageConsumer.java:2431)
at com.ibm.mq.jms.MQMessageConsumer.receiveAsync(MQMessageConsumer.java:3816)
at com.ibm.mq.jms.SessionAsyncHelper.run(SessionAsyncHelper.java:420)
at java.lang.Thread.run(Thread.java:595)
>

Here is the hibernate.cfg.xml settings:

<session-factory>

 <!-- hibernate dialect -->
 <property name="hibernate.dialect">org.hibernate.dialect.Oracle9Dialect</property>

 <!-- JDBC connection properties (begin) ===
 <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
 <property name="hibernate.connection.url">jdbc:oracle:thin:@localhost:1521:xe</property>
 <property name="hibernate.connection.username">name</property>
 <property name="hibernate.connection.password">pass</property>
 ==== JDBC connection properties (end) -->

 <property name="hibernate.cache.provider_class">org.hibernate.cache.HashtableCacheProvider</property>

 <!-- DataSource properties (begin) -->
 <property name="hibernate.connection.datasource">java:comp/env/jdbc/JbpmDS</property>
 <!-- DataSource properties (end) -->

 <!-- JTA transaction properties (begin) ===
 <property name="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</property>
 <property name="hibernate.transaction.manager_lookup_class">org.hibernate.transaction.WebLogicTransactionManagerLookup</property>
 ==== JTA transaction properties (end) -->

 <!-- CMT transaction properties (begin) -->
 <property name="hibernate.transaction.factory_class">org.hibernate.transaction.CMTTransactionFactory</property>
 <property name="hibernate.transaction.manager_lookup_class">org.hibernate.transaction.WebLogicTransactionManagerLookup</property>
 <!-- CMT transaction properties (end) -->

Can anyone help? Thank you very much for your help.