I am fairly familiar with blender, but this is the first time I have tried to import (open) a dxf.
The dxf file seems to open ok and I can see it in the 3d view but when i render I see nothing - the camera is pointing at the object and there is a light source. If I create a sphere in between the camera and dxf object and render, i can see the sphere but not the dxf object.
Thanks for any help.
I had a similar question recently, it turned out that the DXF did not had any faces (only vertices and edges). To check go into FaceSelectMode or switsch to a shaded mode (ZKEY).
PS: Such question are probably better hosted www.elysiun.com,
if it does not lead into a patch to the DXF importer