problem executing action in jsp on input

In my jsp I call an action to get a list of companies like so

<ww:action name="listCompanies" id="companies" />

This is used to populate a drop down elsewhere in a form

<ww:select 
			label="%{getText('label.company')}" 
			name="user.company.id" 
			list="%{#companies.companies}" 
			listKey="id"
			listValue="name"
			value="%{user.company.id}"
		/>

This work fine the first time I enter the page. But if it fails validation, the top action is
not executed and i don't get a list of companies to display. In fact i get the follwing error

java.lang.RuntimeException: tag select, field list: You must specify a collection/array/map/enumeration/iterator. Example: people or people.{name}
	at com.opensymphony.webwork.components.Component.fieldError(Component.java:206)
	at com.opensymphony.webwork.components.Component.findValue(Component.java:269)
	at com.opensymphony.webwork.components.ListUIBean.evaluateExtraParams(ListUIBean.java:50)
	at com.opensymphony.webwork.components.Select.evaluateExtraParams(Select.java:83)
	at com.opensymphony.webwork.components.UIBean.evaluateParams(UIBean.java:885)
	at com.opensymphony.webwork.components.UIBean.end(UIBean.java:588)
	at com.opensymphony.webwork.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:21)
	at org.apache.jsp.WEB_002dINF.pages.user_jsp._jspx_meth_ww_select_0(user_jsp.java:401)
	at org.apache.jsp.WEB_002dINF.pages.user_jsp._jspx_meth_ww_form_0(user_jsp.java:217)
	at org.apache.jsp.WEB_002dINF.pages.user_jsp._jspService(user_jsp.java:100)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	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:810)
	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.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.mfuse.novo.provisioning.web.TransactionInterceptor.intercept(TransactionInterceptor.java:70)
	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)

Is this a bug/feature? is there a work around?
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