Beginner question: No action instance for path /anzeigen could be created

[Wolfgang Rinnert]

Hi all,
I am expanding the Struts Upload example.
Right now I work on a step to display the data that have been uploaded 
to a (server-)local file.
This step consists of invoking an Action that reads the data into 
request scope, and a JSP to display the data.
When invoking the Action I get an error that I cannot find the cause of.
I guess that it is something elementary - like a misunderstanding of 
struts-config,
something missing from web.xml, or my Action class missing a crucial 
element.
BTW, web.xml is unchanged from the example.
Since I cannot find the spot, I am asking for a hint.
Releases used: Sun Java 1.4.2, Tomcat 4.1.30, Struts 1.2.6

Regards,
Wolfgang
Details of the Problem
================
1. Error Message I get from Tomcat:
----------------------------------
HTTP Status 500 - No action instance for path /anzeigen could be created
type Status report
message No action instance for path /anzeigen could be created
description The server encountered an internal error (No action instance 
for path /anzeigen could be created) that prevented it from fulfilling 
this request.

Apache Tomcat/4.1.30

2. Excerpt from logs/catalina.out:
---------------------------------------
23.03.2005 23:07:04 org.apache.struts.action.RequestProcessor 
processActionCreate
SCHWERWIEGEND: No action instance for path /anzeigen could be created
java.lang.ClassCastException
       at 
org.apache.struts.action.RequestProcessor.processActionCreate(RequestProcessor.java:280)
       at 
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:218)
       at 
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1192)
       at 
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:412)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

3. struts-config
----------------
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD 
Struts Configuration 1.1//EN" 
"http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd";>

<struts-config>
   <form-beans>
       <form-bean name="uploadForm" type="wr.upload.UploadForm" />
   </form-beans>
   <global-forwards>
       <forward name="home" path="/index.jsp" />
       <forward name="anzeigen" path="/anzeigen.do" />
       <forward name="success2" path="/success2.jsp" />
   </global-forwards>
   <action-mappings>
       <action path="/upload"
           type="wr.upload.UploadAction"
           name="uploadForm"
           scope="request"
           input="/upload.jsp">
           <forward name="success1" path="/success1.jsp" />
       </action>
       <action path="/anzeigen"
           type="wr.upload.AnzeigenAction"
           scope="request" />
   </action-mappings>
   <controller maxFileSize="2M" />
   <message-resources parameter="resources.application" null="false" />
</struts-config>
4. AnzeigenAction.java
-----------------------
package wr.upload;
import java.util.Vector;
import java.util.logging.Logger;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
public class AnzeigenAction
{
   private static PropertiesSingleton config;
   private static Logger logger = LoggerInitiator.getLogger();
   public AnzeigenAction()
   {
       logger.info( "AnzeigenAction.java" );
   }
          
   public ActionForward execute( ActionMapping mapping,
               ActionForm form,
               HttpServletRequest request,
               HttpServletResponse response )
       throws Exception
   {
           config = PropertiesSingleton.getInstance();
       BuchungenLesen bl = new BuchungenLesen();
       Vector bchListe = bl.readFile( config.getProperty( 
"upload.tempfile" ));
       request.setAttribute( "bchListe", bchListe );
           return mapping.findForward( "success2" );
   }
}

5. index.jsp (this is the caller of URI /anzeigen)
------------
<%@ page language="java" %>
<%@ page import="wr.upload.*" %>
<%@ taglib uri="/tags/struts-bean" prefix="bean" %>
<%@ taglib uri="/tags/struts-html" prefix="html" %>
<html:html locale="true">
   <head>
       <title><bean:message key="index.title"/></title>
   </head>
   <body>
       <p>
           <% PropertiesSingleton ps = PropertiesSingleton.getInstance();
           out.println( "Debug-Level " + ps.getProperty( "log.level" )); %>
       </p>
       <h2>
           <bean:message key="index.title"/>
       </h2>
       <h3>
           <table border="1">
           <tr><td>
               <html:link page="/upload.jsp"><bean:message 
key="index.upload"/></html:link>
           </td></tr>
           <tr><td>
               <html:link forward="anzeigen"><bean:message 
key="index.anzeigen"/></html:link>
           </td></tr>
           <tr><td>
               <html:link page="/laden.jsp"><bean:message 
key="index.laden"/></html:link>
           </td></tr>
           <tr><td>
               <html:link page="/logview.jsp"><bean:message 
key="index.logfile"/></html:link>
           </td></tr>
           </table>
               </h3>
       <p>
           <img border="0" align="right" alt="Logo" 
src="images/struts-power.gif" />
           <bean:message key="general.copyright"/>
       </p>
   </body>
</html:html>

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