BRepAlgoAPI_Section undelying shape

Hi folks!

I am trying to use a section of two TopoDS_Shapes for a subsequent extrusion.

Here is what is working so far:

BRepAlgoAPI_Section section(current_topo_shape,Evolved,PerformNow);
section.ComputePCurveOn1(Standard_True);
section.Approximation(TopOpeBRepTool_APPROX);
section.Build();

current_topo_shape is a shape from the AIS context and Evolved is in this case a simple rectangular block.
If I call section.Shape() I can display the section on the AIS_Context.

What am I receiving when I call section.Shape()?

Trying to extract the wire of the section does not work:

for (TopExp_Explorer wireEx (section.Shape(),TopAbs_WIRE);wireEx.More();wireEx.Next()){

Evolved = BRepOffsetAPI_MakeEvolved (TopoDS::Wire(wireEx.Current()) ,aWire3,Join,AxeProf,Solid,ProfonSpine,Tol);

Handle(AIS_Shape) aEvolved = new AIS_Shape(Evolved);
if (!aEvolved->IsKind(STANDARD_TYPE(AIS_Shape))) //skip
continue;
myAISContext->Display(aEvolved,Standard_False);
OCC_3dBaseDoc::Fit();
Sleep(500);
}