We noticed with Creo 7, that we can no longer change the material of a body that has a collapsed merge. We used to easily merge, collapse and change the material. We did this often when managing imported/purchased parts. We understand, that if we deselect the 'Material' from the Options Property, while doing the Merge, we could then change the material. However, this 'Idea' is specifically to address the inability to change a material after doing a collapse. This is a new limitation that was not there prior to bodies. We used to easily change the material of a part and have its mass properties update. Now, if we want accurate mass properties, we would need to completely rebuild the model. Please help!