Please go to the Ansys Customer Portal and enter the kewword "rgp" under Knowledge Resources->Solutions. KM2061169 explains how to generate RGP files for use with CFX. A sample python script is provided that can be executed by opening a command line window from the CFX launcher. This will generate an RGP file that can be referenced in CFX-Pre under Materials - refer to KM389307 for how to implement the RGP file in CFX.