Ok, so I am editing a pre-made world and I have the object id number from the error message. Whatever this item is, its preventing me from saving the world. Is there a simple way to locate it using the object id number? I have manually searched through every item in the global layer, every lot and am currently searching through objects in every lot (using the property browser)...its taking forever. One would think you could just type the object id into a search box....all I have learned that it is probably not a tree as they do not have a similar number sequence to this mystery object. For what its worth, this is the number 13647877519560467376.