Medium, change detection method, and change detection apparatus

A change detection method comprising:

• receiving, from a second device, a request to a first device for utilizing a function provided via a network;
• acquiring information on a latest version of the function from a device that provides information on the function;
• determining whether a version of the function extracted from the request matches the latest version;
• when the extracted version does not match the latest version, transmitting a trial request in which the request is modified so as to utilize the function of the latest version, to the first device;
• and
• determining whether or not there is compatibility between the version of the function to be utilized by the request and the latest version based on a response to the trial request.

A change detection apparatus comprising:

• a memory;
• and
• a processor coupled to the memory and the processor configured to execute a process, the process including:
• receiving, from a second device, a request to a first device for utilizing a function provided via a network;
• acquiring information on a latest version of the function from a device that provides information on the function;
• determining whether a version of the function extracted from the request matches the latest version;
• when the extracted version does not match the latest version, transmitting a trial request in which the request is modified so as to utilize the function of the latest version, to the first device;
• and
• determining whether or not there is compatibility between the version of the function to be utilized by the request and the latest version based on a response to the trial request.