java.lang.NullPointerException at com.arsdigita.sitenode.BasePresentationManager.servePage

hi,

I'm using waf 6.1 and i've created a application called liberty. I'm able to generate XMl document through bebop code but not able to display the same i'm getting the following error

I'm printing the xml document by using systeme.out.println(doc) in catalina
2004-06-19 19:24:35,563 [ main] INFO  runtime.Startup - Initialization complete
<?xml version="1.0" encoding="UTF-8"?><bebop:page xmlns:bebop="http://www.arsdigita.com/bebop/1.0"><bebop:title>Liberty</bebop:title><bebop:boxPanel axis="2" center="false" width="100%"><bebop:cell><bebop:label escape="no">text here</bebop:label></bebop:cell><bebop:cell><bebop:tabbedPane><bebop:tabStrip><bebop:tab current="t"><bebop:label escape="no">test1</bebop:label></bebop:tab><bebop:tab href="/liberty/?g11n.enc=UTF-8&amp;bbp.2.pane=0&amp;bbp.i=d0.1&amp;bbp.v=1&amp;bbp.e=select&amp;bbp.s=2"><bebop:label escape="no">test2</bebop:label></bebop:tab><bebop:tab href="/liberty/?g11n.enc=UTF-8&amp;bbp.2.pane=0&amp;bbp.i=d0.1&amp;bbp.v=2&amp;bbp.e=select&amp;bbp.s=2"><bebop:label escape="no">test3</bebop:label></bebop:tab></bebop:tabStrip><bebop:currentPane/></bebop:tabbedPane></bebop:cell><bebop:cell><bebop:label escape="no">This is footer text of test page</bebop:label></bebop:cell></bebop:boxPanel></bebop:page>
java.lang.NullPointerException
	at com.arsdigita.sitenode.BasePresentationManager.servePage(BasePresentationManager.java:284)
	at com.arsdigita.sitenode.BasePresentationManager.servePage(BasePresentationManager.java:259)
	at com.EOL.liberty.FirstPage.myservice(FirstPage.java:45)
	at com.EOL.liberty.LibertyServlet.service(LibertyServlet.java:42)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2422)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
	at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:163)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:577)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1040)
	at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1151)
	at java.lang.Thread.run(Thread.java:534)
thanking you
sukesh

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