Could anyone help me with an issue I've found where the calculated volume of a revolved shell turns out as a negative quantity?
I'm trying to determine the total volumes of various materials within a composite structure shell. The attached schedule returns a negative quantity of the innermost layer "Tile - Roof", and leads me to distrust the other quantities!
In the attached image you'll see the calculated volume is higher when holes ARE considered, which I'm guessing is a related issue.
The shell was created with an arc revolved around a different radius, and then various SEO's applied.
Any thoughts / similar experiences / suggestions are warmly received!
I'm running ArchiCAD 18 on osx10.9.5.