NullPointerException module: null not found

[akiravelmont]

Hi when i tried to run the below code i got the error.

org.apache.jasper.JasperException: java.lang.NullPointerException: Module 'null' not found.
org.apache.jasper.servlet.JspServletWrapper.handle JspException(JspServletWrapper.java:522)
org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:416)
org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet .java:717)


this is program data:

import org.apache.struts.action.*;
import javax.servlet.http.*;
public class ActionOne extends Action{
public ActionOne(){
System.out.println("action one() object is created");
}
public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response){
System.out.println("action forward execute()");
ActionForward af=null;
return af;
}
}

i configured the class in struts-config.xml
please help me to resolve this error.

[akiravelmont]

this is how i configured in struts-cinfig.xml

<action type="ActionOne" path="one"/>

[foo123]

the struts redirection result must not be null
return sth like "success" or sth and in struts-config map this result to some url