Michael,

Right, I said that already, if you load the 3DM file into Rhino it's fine but not everyone is able to view 3DM files. I need to export out a generic solid file. So if you export out a STP (from Moi) file the result is the screen grab that I posted. If you export out a STL file you will not get a water tight object and needs to be hand repaired. So yes the rhino screen grab that I posted is correct (I didn't fake it).

I'm not interested in diagnostic tools in Moi. I really like your approach to your software. It's why I use it. I think it's brilliant.
Simple, direct, uncluttered with specific tools. It really is a wonderful product.

I have said this already but I will say it one last time then I give up.

If you export out the un deformed object in any format every single package can read it as a water tight solid.
If you export out the deformed object in generic formats other packages come back with an error.

It's that simple.

There is something happening with your exporters and your deformer. There is no other possible answer.

You asked for people to report bugs. this is a bug.

thanks

Val