I'd try to "segment" that curved shape. Why you ask?.....well because if that stucco curved complex profile were to ever be placed in a "curved wall" or in a "slanted wall" or in another type of kock-a-maymee design....it'll freak out and you'll get some silly "can't display" blah, blah blah message.
It's been my experience that when you "segment" a curve being considered in a 'profile' type of an object, it'll behave better than if you try to make it a smooth curved shaped. Seems "ALL" 3d design softwares have some sort of hang up with this type of computation.
Just my 2cents and you know what they say......
...Bobby Hollywood live from...
i>u
Edgewater, FL!
SOFTWARE VERSION:
Archicad 22, Archicad 23
Windows7 -OS, MAC Maverick OS