title: Adding an admin page on OpenCart version 2
body: <p>I am havin a problem adding an admin page to Opencart2, and following the answers on pretty much identical questions on SO do no help, so I beleive the problem is specific to OC2.   </p>
  
  <p>Following the answer at <a href="https://stackoverflow.com/questions/10700761/how-to-create-a-custom-admin-page-in-opencart/10701414#comment41697932_10701414">this question</a> I still get the error message "<strong>Fatal error: Call to undefined method ControllerCustomHelloWorld::render() in C:\websites\weddingshoponline\shop\admin\controller\custom\helloworld.php on line 13</strong>. Any help would be much appreciated, as I have been going around in circles.</p>
  
  <p>Thank you.</p>
  
  <p>PS Reverting to a previous version of OC is not valid response, albeit a good one. </p>