I know similar issues have been reported before.
I use these settings to mesh more than thousand solid Breps that I created before programatically.
Meshing fails on two of them.
open Rhino.Geometry let meshing = let m = MeshingParameters.FastRenderMesh m.JaggedSeams <- false m.ClosedObjectPostProcess <- true m for guid in rs.ShownObjects() do let brep = rs.CoerceBrep(guid) let mesh = new Mesh() Mesh.CreateFromBrep(brep,meshing) |> Seq.iter mesh.Append print mesh.IsValid
I could narrow the problem down a bit:
I am on Rhino 6.20.19322.20361