Grasshopper won't recognise the mesh from archicad


I’ve used archicad- grasshopper live connection to import a mesh from archicad to grasshopper.
Although, when I wanted to use weaverbird catmull clark subdivision tool grasshopper gives me the warning and says: 1. Input M must be made of meshes or list of closed polylines.

Any ideas?

MESH problem.3dm (173.7 KB)

Your file contains only 1 surface.