search for: _notificaiton

...and that is where a 404 occurs because a RoutingError occured at the controller level. If it happens after the controller has been found (say a view or ID is wrong), then this works. But if application.rb is not called, then it goes back to the default rails code instead of through the exception _notificaiton plugin. This is easily fixed if two changes occur: - you wrap the ExceptionNotification module around the ActionController module like so: module ActionController module ExceptionNotifiable - in init.rb, add this: require ''exception_notifiable'' that is all it takes to self...