Ошибка 404

      if($arResult = $rsIBlock->GetNext())
   {
            .....
        }
 else
   {
      $this->AbortResultCache();
      ShowError(GetMessage("T_NEWS_NEWS_NA"));
      @define("ERROR_404", "Y");
      if($arParams["SET_STATUS_404"]==="Y")
         CHTTP::SetStatus("404 Not Found");
   }