title: cakePHP: I need to include a helper for when there is an error
body: <p>I have made a helper class called Navigation that gets used on every page because it does stuff to my main navigation menu. So in order for this to work I have included the helper in my pages controller like so:</p>
  
  <p>var $helpers = array('Html', 'Javascript', 'Navigation');</p>
  
  <p>however when there is an error like a missing view or something the helper can't be found and I get a reference to a non-object error that messes my page layout up. I'm guessing this is becuase an error page uses a different controller, however there isn't a file error_controller.php or anything in the controllers file. So my question is where do I need to declare the helper so it can be found by an error page. Would I need to make an error controller file or is there already a file that I can add it in to?</p>
  
  <p>Any help would be much appreciated</p>
  
  <p>Thanks</p>