The problem with Polytrans is that the demo version (downloadable at http://www.okino.com) is missing every 5th polygon when a mesh is exported; so I cannot use that; and as I have only two (!) files to convert I am not willing to pay the $395 for the PC version just for having TWO FILES converted! The other one, 3D Explorer, would be just fine if it would do what it is told to do on the website! The website says that *.3dmf and also *.3ds files are supported, but the *.3dmf files are not, as far as I can see. But because the registration fee is here at about $40, I have written to them asking if this depends on the evaluation version or not. I will see if they answer. Thanks even though; maybe someone else of you has some other ideas...? Sabine