Help with toposolid subdivide

Rhino.Inside Revit
1

Hi,

I am trying to create a subdivision but am getting the below error:

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Every boundary is a closed planar curve.
The same error occurs when I try to create the subdivision natively in Revit.

Internalized graph attached, if anybody can take a look I would be very grateful! Thank you.

C

Subdivide internalized.gh (37.2 KB)

2

Can you attach your topsolid files. I don’t see any issue here

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3

Too large to upload.

The result when the selection is reduced is also weird.

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It seems like it could be related to boundary lines coincident with subelement vertices.

Thanks!

4

Unfortunately I can’t open the file as it is saved in newer version of Revit. i am using RVT 2025.4

5

I think it will keep causing issues to try to work with this toposolid, it has nearly 100k faces.

Its such a flat topography overall, and the scale is so large, that it probably makes sense to use a flat toposolid. The highways which are sunken don’t register that well anyway on the free topo. I think the right strategy is to start with a block and spend the time to create sweeps for the voids. Especially because I am going to CNC a base.

i was able to create a subdivision with the entire boundary. But it doesn’t interact with the toposolid correctly. It doesn’t seem to cut. With a negative offset it is completely embedded.

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image644×480 44.5 KB

Not even a single interior boundary produces a working subdivision, but the component is running without errors. I have no clue what is wrong.