This is just a word of caution to give warning. This doesnt happen all the time. 3DS always asks that standard question when saving models. It is perfectly happy in its own environment and the model will open there without problem. Nevertheless, it does not guarantee a flawless conversion. Imagine you are modeling a car for instance and you have come to modeling the tires. Knowing that you will require 4, you systematically clone and rotate to position them. But now youve decided that they seem a wee bit small for the chassis, so you scale them up a little. Youve just put those items through several transforms in their natural space and all seems well but sometimes, not always, after youve converted your model and bring it into a different program youll be perplexed to see 3 out of the 4 tires scattered to some ungodly place in your workspace. 3DS keeps a workflow history that it passes along in hierarchy schemes and sometimes that history isnt finalized. Thats what reset Xform is for. It sort of stamps the final coordinate system on the model part after all the pulling twisting, turning and manipulating. I make it a practice to reset Xform and collapse the stack (work flow history in the modify panel) when I finish a model. This is why you, on occasion, see posted here requests for help from people that have purchased some fine expensive 3DS model thats scattered its parts when imported into Bryce and in very complicated models, those parts may number in the hundreds. Happy converting! ;)