I am getting following, when i followed steps mentioned on the link:
java.lang.NoClassDefFoundError: Could not initialize class org.jbpm.integration.console.StatefulKnowledgeSessionUtil$SessionHolder
org.jbpm.integration.console.StatefulKnowledgeSessionUtil.getStatefulKnowledgeSession(StatefulKnowledgeSessionUtil.java:131)
org.jbpm.integration.console.SessionInitializer.<init>(SessionInitializer.java:25)
org.jbpm.integration.console.TaskManagement.<init>(TaskManagement.java:51)
org.jbpm.integration.console.ManagementFactory.createTaskManagement(ManagementFactory.java:26)
org.jbpm.integration.console.ManagementFactory.createTaskManagement(ManagementFactory.java:19)
org.jboss.bpm.console.server.TaskListFacade.getTaskManagement(TaskListFacade.java:72)
org.jboss.bpm.console.server.TaskListFacade.getTasksForIdRef(TaskListFacade.java:101)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:140)
org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:255)
org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:220)
org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:209)
org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:519)
org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:496)
org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:119)
org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)
javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
org.jboss.bpm.console.server.util.GWTJsonFilter.doFilter(GWTJsonFilter.java:59)