A fracture fixation implant formed from a single piece of material bent in loop form to provide juxtaposed first and second legs joined by a bend. It is determined whether or not a region of a specific part virtual object that simulates the specific part and that of another virtual object overlap each other on an image of a virtual space after the specific part virtual object is laid out based on the position and orientation information on the virtual space on which one or more virtual objects are laid out. The notification is to be consumed by the preceding network switches and requests the preceding network switches to modify the route so as not to traverse the network switch.