Wouldn't it be possible for Library Creator to retrieve the ID from the corresponding xml file when adding an mdl to a library? As it is now, I compile and test models individually. When I am satisfied with the models I compile them into a library. While adding the models to the library new ID's are generated and of course whatever I placed in a scenery is not showing anymore until I manually open each object xml, copy the ID and paste it in the library xml. The same goes for MCX. Thanks.