Sorry for reviving this old thread, but I thought I'd add my $0.02. ㋡

So far (bought ViaCAD not so long ago, after reading that Michael recommends it for its powerful fillets), these file formats give me the best results:

• Exporting SAT from MoI to ViaCAD.

• Exporting STP from ViaCAD to MoI.

It's easy to remember: importing SAT has no options in ViaCAD, and exporting STP from ViaCAD also doesn't have options.

Exporting SAT V8 from ViaCAD caused a model of mine to have some open sides after importing it into MoI, while exporting the same model as STP from ViaCAD resulted in a perfect solid.

All the best,

Metin