It has strong bends and I need to set the thickness

Hi, I’m a newbie. Please help me. I’m making a curved shape. It has strong bends and I need to set the thickness. I’m working with Revit/Grashopper. I’m getting this error now. How can I fix it?
Also, the next step is to create intersecting trusses on a plane. I’d be grateful for some help with this.

upload .gh file etcetera so we have a look.

unnamed2.gh (25.9 KB)
Thanks for the reply. I’ve taken a different approach now, creating two planes in Revit and connecting them using Grasshopper. But I still haven’t figured out the trusses. I need trusses spaced 4 meters apart, and I don’t know how to do that.

I’m attaching the file with the shape I’m using.

Form.3dm (145.5 KB)

Do not use “Walls” as a category. Use generic models/furniture. (Общие модели, если не ошибаюсь, я давно не работал в ревите)

Also your algorithm does not join your surfaces, your data trees do not match. Flatten inputs to join component. Also no need to provide to the same G shape component both original surface and thickened brep.