Facing a problem in self-shading analysis on a textured surface

Hello,

I am quite a beginner in ladybug.

I am trying to do self-shading analysis on a textured surface. When I use "sunLightHourAnalysis" on a freeform single surface, then it works properly. I get a total area of the overall mesh and a total area of the exposed meshes to the sun.

But, when I change the freeform single surface by a textured surface then it results in a list of areas of both the overall meshes and the exposed meshes to the sun.

Could anyone please help me !!

Attached are the files.