Missing Method in WorkinggroupsController

You are seeing this error because the action is not defined in controller WorkinggroupsController

Notice: this error is being rendered by the app/views/errors/missing_action.thtml view file, a user-customizable error page for handling invalid action dispatches.

Fatal: Create Method:

<?php
    class WorkinggroupsController extends AppController
    {
        function ()
        {

        }
    }
?>

in file : app/controllers/workinggroups_controller.php

Error: Unable to execute action in WorkinggroupsController