Hi Hamish,

I have not played around with Alibre for a while since I started using TurboCAD Pro, but if I remember correctly, you can export curves only from MoI as IGES files and then export your solids and surfaces as IGES or STEP files. You could then try to import them into Alibre separately.

Also, Alibre imports 3DM files directly. You should try that as well.

See if that works.

Michael T.