Missing Petition edit view

Pages like
http://localhost/registry/co_petitions/view/3/co:1/coef:2

have an edit button but it goes to

http://localhost/registry/co_petitions/edit/3/co:1

Missing View

Error: The view for CoPetitionsController::edit() was not found.

Error: Confirm you have created the file: /Applications/MAMP/htdocs/r459/trunk/app/View/CoPetitions/edit.ctp

Notice: If you want to customize this error message, create app/View/Errors/missing_view.ctp

Stack Trace

CORE/Cake/View/View.php line 467 → View->_getViewFileName(null)
CORE/Cake/Controller/Controller.php line 947 → View->render(null, null)
CORE/Cake/Routing/Dispatcher.php line 193 → Controller->render()
CORE/Cake/Routing/Dispatcher.php line 161 → Dispatcher->_invoke(CoPetitionsController, CakeRequest, CakeResponse)
APP/webroot/index.php line 96 → Dispatcher->dispatch(CakeRequest, CakeResponse)

Are these supposed to be editable?