Missing Controller

Error: PreviousActivities.htmController could not be found.

Error: Create the class PreviousActivities.htmController below in file: app/controllers/previous_activities.htm_controller.php

<?php
class PreviousActivities.htmController extends AppController {

	var $name = 'PreviousActivities.htm';
}
?>

Notice: If you want to customize this error message, create app/views/errors/missing_controller.ctp