Hi Paul,

>>You cannot beat native geometry for complex calcs which is why models built in ViaCAD work better.

I can understand some problems with 3Dm, but thought IGS would import with less later problems. I know different translators are being used Viacad~ 3d Interop and MoI~ Harmonyware, but would of thought better compatibility. Iges exported from Viacad do import back with no problem on shelling, so it just looks like formatting problems,.. maybe?


- manz