Thanks a lot for your help,
Problem is that these programs only convert from dxf or dwg to an image format (not to a obj file or 3ds necessary to work with sweethome).

Hello,

I need to import models from autocad so I supose that I need to transform them to .3ds or .obj files.
Could you recommend me any tool for this task?
I have seen that Autodesk 3Ds Max can transform from dxf to 3ds but I haven't any license to do this.

Thanks in advance. Diego