Error in creating Custom Rest Communication Service in OCSG
                    
 Hi,
                
                I am trying to develop Custom Rest Communication Service but getting following error in eclipse. i have no clue to resolve it
java.lang.IllegalArgumentException: URL String 'null' is illegal.
	at oracle.ocsg.wadlc.ant.Wadl2WsdlTask.execute(Wadl2WsdlTask.java:65)
	at oracle.ocsg.ant.rest.WsGenTask.generateServiceWadl2Wsdl(WsGenTask.java:417)
	at oracle.ocsg.ant.rest.WsGenTask.execute(WsGenTask.java:183)
	at oracle.ocsg.ant.rest.CommunicationServiceGenTask.generateWSEJB(CommunicationServiceGenTask.java:360)
	at oracle.ocsg.ant.rest.CommunicationServiceGenTask.execute(CommunicationServiceGenTask.java:93)
	at com.bea.wlcp.wlng.ant.TaskRunnerBase.run(TaskRunnerBase.java:180)
	at oracle.ocsg.ant.rest.CommunicationServiceGenTaskRunner.main(CommunicationServiceGenTaskRunner.java:36)
Caused by: java.lang.IllegalArgumentException: URL String 'null' is illegal.
0      
            