Cannot find bean error in any scope

[R. Markham]

I get following error if I push the submit button. 

 

javax.servlet.ServletException: Cannot find bean error in any scope
 
I have following in my JSP File
 

      <tr>

            <td>Lastname</td>

            <td><struts-html:text property="lastname"/></td>

            <td>

                   <struts-html:messages id="error" property="lastname">

                  <struts-bean:write name="error"/>

             </struts-html:messages>

        </td>

    </tr>

I want to produce an error message beside the input field if the input field
is empty. If I delete the line <struts-bean:write name="error"/> the program
works but there is no error message

 
Any idea?
 
Richard Markham