Elliptical elements have always been rather awkward to create in Revit. For instance you can’t create an elliptical wall without first creating an elliptical mass & then performing the wall by face function.
Whilst you could easily argue that ellipses are the scourge of architectural design, cause they are a pain in the arse to set out. Nether the less they are an important form to any designer or interior designer. Anyway, I was having some fun the other day looking at the best way to divide an ellipse into a number of equal segments. My old school CAD head kicked in, draw the ellipse, draw a series of circles on the perimeter on the ellipse then draw lines from the centroid of the ellipse to intersect with the ellipse of the circle. So I started in a new Revit project, followed the above procedure only to find I could not snap a line to the intersection of the ellipse & the circle??? Hmmm this seemed a bit odd….a bug may be? Anyway, I jumped over to the conceptual massing environment ( CDE in project as well as a family), did the same exercise & everything worked peachy here!
I don’t know what the project environment has against ellipses, but it needs to get learn from its sibling conceptual mass environment & get with the kids! One for the development team me thinks.