In a case where a first information including an execution request of a specific function via a first type of interface is received, a function executing device may execute a change process for changing an interface for communicating with a terminal device from the first type of interface to a second type of interface in a case where a state of the function executing device is determined as a non-error state. The function executing device may not execute the change process in a case where the state of the function executing device is determined as an error state. The specific function may include a communication process for communicating object data with the terminal device. The function executing device may execute the specific function including the communication process via the second type of interface in a case where the change process is being executed.