From TurboGrid 17.0, the Traditional With Control Point topology definition is not available anymore by default and has been replaced with the Automatic Topology and Meshing method (ATM). To access the Traditional option, the Advanced and Beta Features have to be enabled in the TurboGrid Options (Edit > Option > TurboGrid menu). From TurboGrid 18.1, this Traditional With Control Point topology definition is not available anymore at all. The Automatic Topology and Meshing method (ATM) is the new method to replace the Traditional one. For any question or problem with the ATM method, feel free to contact your local ANSYS support.