JSP/JSTL: Well-formed taglib

there is no error in ur includes , however try to run ur page i think it will run ok

What is there in line 9 in lists.jsp ? Post first 20 lines

<jsp:root version="1.2" xmlns:jsp="http://java.sun.com/JSP/Page" xmlns:display="urn:jsptld:http://displaytag.sf.net">
  <jsp:directive.page contentType="text/html; charset=UTF-8" />
  <jsp:directive.page import="org.displaytag.sample.*" />  
  <jsp:include page="inc/header.jsp" flush="true" />  
  <jsp:scriptlet> request.setAttribute( "test", new ReportList() ); </jsp:scriptlet>  

 
 
    <%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
    <%@ taglib uri="http://java.sun.com/jstl/sql" prefix="sql" %>    
   
    <sql:query var="results">
      select * from table
    </sql:query>
    <display:table name="${results.rows}" />
 
 
 
 
  <display:table name="test" export="true" sort="list" pagesize="8">
    <display:column property="city" title="CITY" group="1" sortable="true" headerClass="sortable" />
    <display:column property="project" title="PROJECT" group="2" sortable="true" headerClass="sortable" />
    <display:column property="amount" title="HOURS" />
    <display:column property="task" title="TASK" />
  </display:table>
 
  <jsp:include page="inc/footer.jsp" flush="true" />

</jsp:root>

try to put this

 
    <%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
    <%@ taglib uri="http://java.sun.com/jstl/sql" prefix="sql" %>    


at the begining of the page

You mixed XML style with standard JSP style. Try this:

<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jstl/sql" prefix="sql" %>
<%@ taglib uri="http://displaytag.sf.net/el" prefix="display"%>
  <%@page contentType="text/html; charset=UTF-8" %>
  <%@page import="org.displaytag.sample.*" %>
  <jsp:include page="inc/header.jsp" flush="true" %>
  <% request.setAttribute( "test", new ReportList() ); %>
 
 
 
 
    <sql:query var="results">
      select * from table
    </sql:query>
    <display:table name="${results.rows}" />
 
 
 
 
  <display:table name="test" export="true" sort="list" pagesize="8">
    <display:column property="city" title="CITY" group="1" sortable="true" headerClass="sortable" />
    <display:column property="project" title="PROJECT" group="2" sortable="true" headerClass="sortable" />
    <display:column property="amount" title="HOURS" />
    <display:column property="task" title="TASK" />
  </display:table>
 
  <jsp:include page="inc/footer.jsp" flush="true" />

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...results in error 'Invalid standard action'