[displaytag-user] X Servlet Error: javax/servlet/Filter: java.lang.Exception: javax/servlet/Filter

[srimathy vasudevan]

I get the above error when using export with  displaytag-version-b2.the code 
works with version-b1.but since i want to include column headers i use the 
latest version
Please help me

X Servlet Error: javax/servlet/Filter: java.lang.Exception: 
javax/servlet/Filter
at _exporting_jsp_3._jspService(_exporting_jsp_3.java:234)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:142)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at 
org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspServlet.java:300)
	at org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java:430)
	at org.apache.jasper.runtime.JspServlet.service(JspServlet.java:565)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at 
com.ibm.servlet.engine.webapp.StrictServletInstance.doService(ServletManager.java:827)
	at 
com.ibm.servlet.engine.webapp.StrictLifecycleServlet._service(StrictLifecycleServlet.java:167)
	at 
com.ibm.servlet.engine.webapp.IdleServletState.service(StrictLifecycleServlet.java:297)
	at 
com.ibm.servlet.engine.webapp.StrictLifecycleServlet.service(StrictLifecycleServlet.java:110)
	at 
com.ibm.servlet.engine.webapp.ServletInstance.service(ServletManager.java:472)
	at 
com.ibm.servlet.engine.webapp.ValidServletReferenceState.dispatch(ServletManager.java:1012)
	at 
com.ibm.servlet.engine.webapp.ServletInstanceReference.dispatch(ServletManager.java:913)
	at 
com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:523)
	at 
com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:282)
	at 
com.ibm.servlet.engine.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:112)
	at 
com.ibm.servlet.engine.srt.WebAppInvoker.doForward(WebAppInvoker.java:91)
	at 
com.ibm.servlet.engine.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:184)
	at 
com.ibm.servlet.engine.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:67)
	at 
com.ibm.servlet.engine.invocation.CacheableInvocationContext.invoke(CacheableInvocationContext.java:106)
	at 
com.ibm.servlet.engine.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:125)
	at 
com.ibm.servlet.engine.oselistener.OSEListenerDispatcher.service(OSEListener.java:315)
	at 
com.ibm.servlet.engine.http11.HttpConnection.handleRequest(HttpConnection.java:60)
	at 
com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:323)
	at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:252)
	at com.ibm.ws.util.CachedThread.run(ThreadPool.java:122)

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