I am following the webinar instructions to create a loft. I have added three 3d forms each with four vertices on parallel workplanes. When I select Create ML from the loft tools I expected to be able to click on a vertex in each workplane to make my matchline and worplane set but I am only permitted to make a selection box and then get and error that ""selection has failed. please re-select. error 301"". Can someone give me some guidance on this. Picture is attached.