IGES files can be imported if you have AutoCAD Mechanical.
The 2D DXF was possibly 'cause they exported from a 2D drawing, not the 3D
model.
DXF has some 3D capability but I really wouldn't recommend it, very faceted.
If you are getting a lot of 3D models, I'd get either AutoCAD Mechanical, which
will give you IGES,
or (best bet) Mechanical Desktop, which will give you STEP import capability.
"Tomas" wrote in message
news:8F341431BB8EB526992D88B15838792A@in.WebX.maYIadrTaRb...
> Hello,
>
> Maybe somebody knows how to import:
> 1.* .STL
> 2.* .UNIV
> 3.*.IGES file in to AutoCAD
>
> Solid model drawing is made with IDEAS software, but when it is exported in
> to AutoCAD *.DXF format it appears in 2D instead of 3D. What could be the
> problem?
>
> Thank you!
>
> Tomas
>
>