Need help to build a cubic polycrystal containing multiple porous

[mdlbyc]

Your paper and code is very fascinating, I need to build a cubic polycrystal containing multiple porous, I read your code carefully and tried to modify the code, the cubic is easy to build but the polycrystal fails, the error message suggests the following: A point is found not to lie on the face's surface. Here are the codes I have modified, I will be very grateful and happy if I can get your guidance to
Polycrystal_cube.zip