I was able before in my previous project to load garage door from Family ''US imperial'' and the one I downloaded from Revit City but some commercial components (doors) I still could not load from Revit family ''US imperial". With my new project I have even more problems. More components (not all) can not be loaded. This is the same message I keep getting before and now: SOME OR ALL FAMILY FILES YOU SELECTED CAN NOT BE LOADED. YOU MUST CHOOSE FAMILY FILES OF THE CATEGORY COMPONENT. DO YOU WANT TO RETRY LOADING A NEW SET OF FILES ? Retrying - the same message appears over and over. Please help ? Thank you !