Select the geometry method for the type of curved curtain wall you are attempting.
Please add the version of archicad you are using to your profile. Answers sometimes vary dependent upon version being used.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"