title: jsf - "Cannot find component with expression"
body: <p>I'm using PrimeFaces and a component within one <code>layoutUnit</code> must update another component which is within another <code>layoutUnit</code>:</p>
  
  <pre><code>&lt;p:layout&gt;
    &lt;p:layoutUnit position="west" size="275" resizable="true" closable="true" collapsible="true"&gt;
      &lt;h:form id="formWest"&gt;
        &lt;div id="west"&gt;
          &lt;ui:insert name="west"&gt;&lt;/ui:insert&gt;
        &lt;/div&gt;
      &lt;/h:form&gt;
    &lt;/p:layoutUnit&gt;
    &lt;p:layoutUnit id="layout_center" position="center"&gt;
      &lt;h:form id="formCenter"&gt;
        &lt;div id="content"&gt;
          &lt;ui:insert name="content"&gt;&lt;/ui:insert&gt;
        &lt;/div&gt;
      &lt;/h:form&gt;
    &lt;/p:layoutUnit&gt;
  &lt;/p:layout&gt;
  </code></pre>
  
  <p>The error message is: <code>Caused by: javax.faces.FacesException: Cannot find component with expression "formWest:execucao" referenced from "formCenter:form:mapaGoogle".</code></p>
  
  <p>The components that need to be updated are inside <code>td</code> so I did <code>&lt;td jsf:id="execucao"&gt;</code>, for example.</p>