java - Primefaces: adding growl into my view -

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i'm implementing web app using primefaces components in view part. problem comes when want use < p:growl > anywhere, have error when page loaded. firebug says: "widget_j_idt25_headlogin_messages not defined". looks when primefaces generated, javascript trying use component, finds it's not defined.

however, when remove tag works , jsf error messages displayed. i'm using primefaces 3.1.1 library, ideas how solve issue?

here you've code:

<?xml version='1.0' encoding='iso-8859-15' ?> <ui:composition xmlns="http://www.w3.org/1999/xhtml" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:p="http://primefaces.org/ui" xmlns:ui="http://java.sun.com/jsf/facelets">  <h:form id="download_manager_form">      <p:growl id="messages" />      <p:ajax event="click" update="messages"/>      <p:datatable value="#{downloadmanagerbean._tablebean._list}"         var="download" style="width:100%">         <f:facet name="header">             <h:outputtext value="#{msg.download_manager_title}" />         </f:facet>         <p:column sortby="#{download._filename}"             filterby="#{download._filename}"             headertext="#{msg.file_path_download}">             <p:commandlink                 actionlistener="#{downloadmanagerbean.actiondownload}">                 <h:outputtext value="#{download._filename}" />                 <f:param name="id" value="#{download._id}" />             </p:commandlink>         </p:column>         <p:column sortby="#{download._overduedate}"             filterby="#{download._overduedate}"             headertext="#{msg.overdue_date_download}">             <h:outputtext value="#{download._overduedate}" />         </p:column>         <p:column sortby="#{download._created}"             filterby="#{download._created}" headertext="#{msg.file_created}">              <h:outputtext value="#{download._created}" />         </p:column>         <p:column sortby="#{download._filesize}"             filterby="#{download._filesize}" headertext="#{msg.file_size}">             <h:outputtext value="#{download._filesize}" />         </p:column>      </p:datatable> </h:form>

solved. had h:head tag missing in main page! way, it's not necessary update growl component, without declaring autoupdate, it's enough add faces message faces context in server side!!


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