1. An information processing device, comprising:control circuitry configured to
store, in a first memory, record information formed each time a predetermined event occurs in the information processing device, and perform an update process of successively updating an old piece of record information with a new piece of record information in the record information stored in the first memory;
transmit, to an external information processing device for storage in an external memory, the record information stored in the first memory, via a first signal line;
transfer communication abnormality record information corresponding to the record information stored in the first memory to a second memory, which is configured not to update record information, and store the communication abnormality record information in the second memory, in response to a communication abnormality signal, indicating a communication abnormality of the first signal line, being supplied via a second signal line from the external information processing device; and
transmit, to the external information processing device, the communication abnormality record information stored in the second memory via the first signal line, in response to communication of the first signal line being restored.