Cannot extrude an imported rectangular face
I've examined the tutorial and I know how to extrude a geometry along with a hexahedral mesh. It works for a rectangular surface created in Gmsh but doesn't work for an imported rectangular face. I don't get any errors, the extrusion is just not performed. I attached the step file with geometry. Here's the content of the corresponding .geo file:
Merge "Face.step";
//+
Transfinite Curve {4, 3, 2, 1} = 10 Using Progression 1;
//+
Transfinite Surface {1};
//+
Extrude {0, 0, 2000} {
Surface{1}; Layers {40}; Recombine;
}
Am I doing something wrong or is the imported geometry somehow broken ?