virendra agarwal [http://community.jboss.org/people/viren_agarwal_rsg] replied to the discussion "Unable to set the mail configuration properties in JBPM 4.3" To view the discussion, visit: http://community.jboss.org/message/549321#549321 -------------------------------------------------------------- This is the stacktrace Exception in thread "main" java.lang.NullPointerException     at org.jbpm.pvm.internal.processengine.ProcessEngineImpl.checkDb(ProcessEngineImpl.java:152)     at org.jbpm.pvm.internal.processengine.ProcessEngineImpl.<init>(ProcessEngineImpl.java:105)     at org.jbpm.pvm.internal.cfg.ConfigurationImpl.buildProcessEngine(ConfigurationImpl.java:92)     at org.jbpm.api.Configuration.getProcessEngine(Configuration.java:126)     at org.jbpm.examples.java.JBPMRepository.createProcessEngine(JBPMRepository.java:35)     at org.jbpm.examples.java.JBPMMailTest.initiateJBPMEngine(JBPMMailTest.java:19)     at org.jbpm.examples.java.JBPMMailTest.main(JBPMMailTest.java:65) I did little change in it to get it work . I have included these in xml file <import resource="jbpm.default.cfg.xml" />   <import resource="jbpm.businesscalendar.cfg.xml" />   <import resource="jbpm.tx.hibernate.cfg.xml" />   <import resource="jbpm.jpdl.cfg.xml" />   <import resource="jbpm.bpmn.cfg.xml" />   <import resource="jbpm.identity.cfg.xml" /> Now null pointer is gone but authentication error is still there How can i override default xml defination -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/549321#549321] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]