[displaytag-user] Save As CSV not Working

[Chetan Pandey]

Hi List:   I am using displayTag in my Struts-Tiles Application.   When I click on “Save as CSV” Link my jsp embedded in its Tiles Framework forwards page to the following:   /********************Start of  Printing********************************/   HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception org.apache.jasper.JasperException         org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)         org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)         org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)         org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)         javax.servlet.http.HttpServlet.service(HttpServlet.java:802) root cause java.lang.NullPointerException        org.apache.struts.taglib.tiles.InsertTag.processAttribute(InsertTag.java:687)        org.apache.struts.taglib.tiles.InsertTag.createTagHandler(InsertTag.java:478)        org.apache.struts.taglib.tiles.InsertTag.doStartTag(InsertTag.java:438)        org.apache.jsp.layout1_jsp._jspx_meth_tiles_insert_0(org.apache.jsp.layout1_jsp:140)        org.apache.jsp.layout1_jsp._jspService(org.apache.jsp.layout1_jsp:71)        org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)        org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)        javax.servlet.http.HttpServlet.service(HttpServlet.java:802) note The full stack trace of the root cause is available in the Apache Tomcat/5.5.15 logs. Apache Tomcat/5.5.15 /************************END OF PRINTING*******************************************/   It seems somehow the  file is going to my layout1.jsp file where I have declared how the page should appear and my jsp file is embedded inside this layout1.jsp.   Can anyone pls explain me whats happening.   Chetan

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