Simple radiation help with weird surfaces


I am trying to work with some existing rhino geometry that are all rhino surfaces. I’m still in Rhino 5. Model units are set to meters.

I have a simple radiation ladybug “script” that I have used many times before.
See link here:

When I select a single surface to analyze (id eventually like to analyze all glass surfaces but started with one to test), the graphic output is really wacky, with a variety of color strands.
See link here:

Is it some issue with the geometry itself? I traced over with a new surface and set that to the brep and had similar results.

I never used to have issues like this.


Can you share the file please?

Devang -

Please see link to files at my dropbox here: