Flow works great in MOI. It stays a solid and all is good but when I export the object to another program (stp, IGS SAT) (rhino, autodesk, 123D, turbocad, freecad) it doesn't necessarily come out as a solid or correctly. Is there something I'm missing? plus when I try to save it as a STL I get errors (the same errors I would get from a non solid)

thanks

Val