Framework error when using select

Hi, I´m a new webwork user. An error appears when I use select tag. The code is above:

<ww:select 
	label="%{getText('product.group')}"  
	headerKey=""
	headerValue="%{getText('product.select.group')}"
	name="product.productGroups.idProductGroup" 
	list="productGroups"
	listKey="idProductGroup"
	listValue="productGroup"
	required="true" theme="xhtml"/> 

I tried to change theme to "simple", but the error continues. The error is:


2006-06-13 11:26:03,800 [http-8080-Processor24] ERROR - 
Error on line 37, column 13 in template/simple/select.ftl
stack.findValue(parameters.listKey) is undefined.
It cannot be assigned to itemKey
The problematic instruction:
----------
==> assignment: itemKey=stack.findValue(parameters.listKey) [on line 37, column 13 in template/simple/select.ftl]
 in user-directive ww.iterator [on line 35, column 1 in template/simple/select.ftl]
 in include "/${parameters.templateDir}/simple/select.ftl" [on line 2, column 1 in template/xhtml/select.ftl]
----------

Java backtrace for programmers:
----------
freemarker.core.InvalidReferenceException: Error on line 37, column 13 in template/simple/select.ftl
stack.findValue(parameters.listKey) is undefined.
It cannot be assigned to itemKey
	at freemarker.core.Assignment.accept(Assignment.java:111)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.IfBlock.accept(IfBlock.java:82)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.visit(Environment.java:233)
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:116)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.include(Environment.java:1375)
	at freemarker.core.Include.accept(Include.java:155)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:196)
	at freemarker.core.Environment.process(Environment.java:176)
	at freemarker.template.Template.process(Template.java:231)
	at com.opensymphony.webwork.components.template.FreemarkerTemplateEngine.renderTemplate(FreemarkerTemplateEngine.java:124)
	at com.opensymphony.webwork.components.UIBean.mergeTemplate(UIBean.java:637)
	at com.opensymphony.webwork.components.UIBean.end(UIBean.java:591)
	at com.opensymphony.webwork.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:21)
	at org.apache.jsp.stock.product_002dstock_jsp._jspx_meth_ww_select_0(product_002dstock_jsp.java:334)
	at org.apache.jsp.stock.product_002dstock_jsp._jspService(product_002dstock_jsp.java:105)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:499)
	at com.opensymphony.webwork.components.Include.include(Include.java:224)
	at com.opensymphony.webwork.components.Include.end(Include.java:133)
	at com.opensymphony.webwork.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:21)
	at org.apache.jsp.stock.product_jsp._jspx_meth_ww_include_3(product_jsp.java:909)
	at org.apache.jsp.stock.product_jsp._jspx_meth_ww_panel_1(product_jsp.java:879)
	at org.apache.jsp.stock.product_jsp._jspx_meth_ww_tabbedPanel_0(product_jsp.java:770)
	at org.apache.jsp.stock.product_jsp._jspx_meth_ww_form_0(product_jsp.java:715)
	at org.apache.jsp.stock.product_jsp._jspx_meth_ww_i18n_0(product_jsp.java:212)
	at org.apache.jsp.stock.product_jsp._jspService(product_jsp.java:90)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
	at com.opensymphony.webwork.dispatcher.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:114)
	at com.opensymphony.webwork.dispatcher.WebWorkResultSupport.execute(WebWorkResultSupport.java:101)
	at com.opensymphony.xwork.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:312)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:207)
	at com.opensymphony.xwork.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:137)
	at com.opensymphony.xwork.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:81)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
	at com.opensymphony.xwork.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:115)
	at com.opensymphony.xwork.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:81)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
	at com.opensymphony.webwork.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:171)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
	at com.opensymphony.xwork.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:151)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
	at com.opensymphony.xwork.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:100)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:189)
	at com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:113)
	at com.opensymphony.webwork.dispatcher.DispatcherUtils.serviceAction(DispatcherUtils.java:233)
	at com.opensymphony.webwork.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:198)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
	at java.lang.Thread.run(Unknown Source)

Please, can you help me?

Thanks,


Andréa
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