Salve! Ho creato con Eclipse un progetto java utilizzando le librerie di struts 1.3.8. Il mio struts-config è il seguente:

codice:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd">

<struts-config>
	<form-beans >
		<form-bean name="homeForm" type="form.HomeForm" />
		
	</form-beans>
	
	<global-exceptions />
	<global-forwards />
	<action-mappings >
		<action
		       attribute="homeForm"
		       
		       name="homeForm"
		       path="/home"
		       scope="request"
		       type="action.HomeAction" >
			<forward name= "success" path="/jsp/home.jsp"/>
		</action>
	</action-mappings>
	
	<message-resources parameter="ApplicationResources" />
</struts-config>
Ho una jsp home.jsp con dei form, i cui campi sono stati internazionalizzati attraverso il file ApplicationResources.
codice:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
		<title>Home Esercitazione</title>
	</head>
	<body bgcolor="#FFE4E1">
	
		<html:form>
	<font color="blue"><bean:message key="login.user"/></font>:<html:text property="user"/><html:errors property="user"/>

	<font color="blue"><bean:message key="login.password"/></font>
	<font color="red"><html:submit titleKey = "login.submit.value" /></font>
		</html:form> 
	</body>
</html>
Quando cerco di avviare da tomcat questa action mi comprare questa eccezione che non riesco a capire:
codice:
 
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:476)
        org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:389)
        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)
        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

root cause 
java.lang.NullPointerException
        org.apache.struts.taglib.TagUtils.getActionMappingName(TagUtils.java:583)
        org.apache.struts.taglib.html.FormTag.lookup(FormTag.java:834)
        org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:467)
        org.apache.jsp.jsp.home_jsp._jspx_meth_html_005fform_005f0(home_jsp.java:102)
        org.apache.jsp.jsp.home_jsp._jspService(home_jsp.java:77)
        org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328)
        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)
        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

note The full stack trace of the root cause is available in the Apache Tomcat/5.5.23 logs.
Mi sapreste dire di che tipo d eccezione si tratta? Se occorre, posto le classi Form e Action...
Grazie