I 've years of exp in Softimage 3D. and the more i know, the more i discover it's disable. Last week when i setting up my character. I set 18 clusters to one geometry. I have 2 geomatries. I created 18 nulls to contrain object to cluster. It was fine, when i move the geometry, nulls are follow. However, when i save scene, seems nothing happen. When i load back the scene out. nulls ain't follow. clusters are here, nulls are here. I relax the contrains. contrain them again. no it won't work. What i have to do is re-assign all the cluster and contrain it again. save, check. Do it over and over again until it doesn't have the error on saving. Which takes me 5 hours of fixing. And i still don't know how to not let the same thing happen again. See if anyone has this happen b4.