No identiyServcie is not null. With the same configuration I am able to do everything else (like starting a process, assigning task, etc.,) By the way the version of jBPM is 4.0. and here is the exception Exception in thread "main" java.lang.NullPointerException | at org.jbpm.pvm.internal.identity.cmd.CreateGroupCmd.execute(CreateGroupCmd.java:48) | at org.jbpm.pvm.internal.identity.cmd.CreateGroupCmd.execute(CreateGroupCmd.java:32) | at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java:42) | at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java:54) | at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:54) | at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:55) | at org.jbpm.pvm.internal.svc.IdentityServiceImpl.createGroup(IdentityServiceImpl.java:78) Thanks Manju View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4254595#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...