That message tends to happen when an OBJ file is not in its proper place. Make sure the OBJ file is in the proper RUNTIME/GEOMETRIES folder. You can tell where it belongs by opening the CR2 file in a text editor (notepad is what I use). You will see a line that says- :Runtime:Geometries:"foldernamehere":"objnamehere.obj" The foldernamehere part of that is the location of where the OBJ file should be within your Runtime/Geometries folder. Then, if it is in the proper place, go to that folder anyways and DELETE the RSR for that OBJ.