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Error page exception

The server cannot use the error page specified for your application to handle the Original Exception printed below. Please see the Error Page Exception below for a description of the problem with the specified error page.


Original Exception:

Error Message: Filter [PageFilter]: filter is unavailable.
Error Code: 500
Target Servlet: /pages/nm/nmhomepage.jsp
Error Stack:
java.lang.NullPointerException
    


Error Page Exception:

Error Message:
Error Code: 0
Target Servlet: null
Error Stack:
java.lang.NullPointerException
     at atg.taglib.dspjsp.PageTag.doStartTag(Unknown Source)
     at atg.taglib.dspjsp.elwrap.PageTagWrapper.doStartTag(Unknown Source)
     at com.ibm._jsp._pageNotFound._jspx_meth_dspel_page_1(_pageNotFound.java:1483)
     at com.ibm._jsp._pageNotFound._jspx_meth_c_otherwise_0(_pageNotFound.java:1567)
     at com.ibm._jsp._pageNotFound._jspx_meth_c_choose_0(_pageNotFound.java:1596)
     at com.ibm._jsp._pageNotFound._jspService(_pageNotFound.java:127)
     at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:93)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
     at com.ibm.ws.cache.servlet.ServletWrapper.serviceProxied(ServletWrapper.java:262)
     at com.ibm.ws.cache.servlet.CacheHook.handleFragment(CacheHook.java:438)
     at com.ibm.ws.cache.servlet.CacheHook.handleServlet(CacheHook.java:238)
     at com.ibm.ws.cache.servlet.ServletWrapper.service(ServletWrapper.java:244)
     at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1697)
     at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1646)
     at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:113)
     at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:82)
     at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:822)
     at com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:121)
     at com.ibm.ws.jsp.webcontainerext.JSPExtensionServletWrapper.handleRequest(JSPExtensionServletWrapper.java:216)
     at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.include(WebAppRequestDispatcher.java:670)
     at com.ibm.ws.webcontainer.webapp.WebApp.sendError(WebApp.java:2835)
     at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:111)
     at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:1936)
     at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:120)
     at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:434)
     at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:373)
     at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:253)
     at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminaters(NewConnectionInitialReadCallback.java:207)
     at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:109)
     at com.ibm.ws.tcp.channel.impl.WorkQueueManager.requestComplete(WorkQueueManager.java:566)
     at com.ibm.ws.tcp.channel.impl.WorkQueueManager.attemptIO(WorkQueueManager.java:619)
     at com.ibm.ws.tcp.channel.impl.WorkQueueManager.workerRun(WorkQueueManager.java:952)
     at com.ibm.ws.tcp.channel.impl.WorkQueueManager$Worker.run(WorkQueueManager.java:1039)
     at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1475)