[areas within surfaces are filled]

Thank you. I found the solution.

This model is from a surface mit thickness. Y

Cura will fill all areas inside the surface. After removing surface it's all fine

[areas within surfaces are filled]

today I crated an Solid over a surface.

Now I see my printer fills the empty area. This is made from cura in the GCODE.

I think the problem is the Surface. I found no way to remove the Surface in CAD.

Can I say cura he must ignore surfaces ?

surf_1 is Cura, surf_2 Cura preview, surf_3 CAD and you can see the surface around the solid

Thanks for help