Modeling Operation Error: Inconsistent face-body relationships.

[ReMark]

I never would have guessed given the explanation you gave previously. Why did you use a combination of surfaces and solids?

So you are finished?

[turboCAD]

well, the lateral surfaces will gain a width/thickness as they will need to show in the printed object. The smart thing, from me, would have been to create the thickness before slicing and extruding, maybe It would have gone better(the slicing).
I have drawn the surface I wanted so I have finished with the subject of this thread.

[turboCAD]

so, Thank all of you for your help!