Collada import issues

Hello

We have problems importing a .dae file.

Source is Vectorworks 2021.

Are there certain geometries that SKP does not like in .dae format?

Would rather not use 3DS unless we have to.

What geometry is not coming through the import? Or how is it changed? What’s the dimension of the object being imported? Screenshot or post files.

Nothing is coming through. Alert dialog appears. Import failed.

Looks fine when we view in Preview.

Wondered if there were certain geometries SKP does not like.

We can simply extrude a rectangle in VW2021, and it fails to import, but looks fine in Preview. The geometry is definitely there, but there is something SKP does not like.