I have 12 obj file rooms. Butsince I updated to version 7.8, they stopped opening. All other 3d software openfiles, but iclone and 3dxchange do not. It says "Cannot load invaliddata". I have a single polygon an obj door file. Iclone can open it. But it doesn't open the rooms. Is there a restriction for obj files and Is there anybody who has the same problem as me? What do I have todo to download 7.7?