How to transfer Trimmed Surface Into Face Wall in Revit

In my project ,I have to create a trimmed bending surface.I want it to become a wall in Revit. So I use "Add Form "Component to create a volume family in Revit and load it in my project.I want to use FaceWall instruction to transfer it into wall,but it faild. So how can I create a strange wall based on a trimmed surface.

take a look at this custom component, a native component is currently in the works and should be available before rc1.4