Export as Step what is Bsplinesurface

 From:  Matadem
11773.1 
Good day.

I am trying to export a step file to Freecad to do some operations but for some reason I cannot get it to work.

On Freecad forums I was told

The type of this surface is BSplineSurface
The Pocket operation can not process this type of face

Is there a way to change this when exporting to Step file?
I am trying to use Freecad for the cam portion since it has adaptive tool paths.

Tnx!