Hi Alphapack - I believe the Maya Personal Learning Edition does not have the full set of file support that the regular Maya version has.

One thing that should work is export from MoI to .3ds format, then use the 3dsin command in AutoCAD.

Does that do the job for you?

Another possibility is to export from MoI to .obj format, using the "Output: Quads & Triangles" option, then use a converter program like 3DWin to convert it into DXF format, which is supported by AutoCAD as well. 3DWin supports a lot of formats so with this method I would think you should be able to find something in common with your other programs.

- Michael