Hmmm, I usually have no probs with exporting my models as an .obj from Wings3D. Make sure you give Wings enough time to do the job of generating a file. You can't rush Wings, and sometimes complex calcs with lots of polygons takes time.But even so it usually doesn't take long. The newest versions of Wings have a "progress bar" that tells you when an operation is successfully completed. You can also export as a .3ds file which will import into Bryce, but an .obj file is easier to take into UV mapping apps. I would try saving again and see what happens.