Thank You for the repliss. I thought I had resolved the issues and began in ernest this morning. I had been unable to bring into Vue via 3ds a model with textures intact. As a workaround I split the model into pieces and imported individually. To my surprise the program resized the pieces which made re-assembly difficult. I discovered in preferences a checkbox that I could deselect so scaling would not occur. Today the program began crashing so frequently that I cannot continue. The only thing I did was reinstall the program to correct another problem with the program requesting textures I never used. That problem was resolved with the re-install. The only other difference is that the new model contains groups of objects. Model creation: pc version of sketchup VueD: Mac version OSX bridge program: Deep exploration to unify normals. Anyone, have any insight into the crashing program problem? Deadline: tomorrow mid day. Larry