Hi Michael, Thank you for your Answer the 3dmCurves2DXF does not work with my CAD/CAM Program (NCCAD) unfortunatly.
As it shows an empty file. I know that in Rhino accours the same problem with the standart export option but it works with r12 natural.
I like moi3d for the drawings cuz it is really intuitive an. The .stl export works great. I want create my eyewear with a mixture of 3d and 2d milling. Therefore I need the lines drawn in moi3d too.

If there is any possibility to use 3dmCurves2DXF anyway I'd be happy