Communication error information output method, communication error information output device and recording medium therefor

摘要

A method and device of outputting information related to a communication error including obtaining a communication log containing a communication message delivered between a second device and a third device in accordance with a control message transmitted from a first device to the second device. A non-transmitted control message specifying procedure reading out control message association information containing identification information of a control message delivered between the second device and the third device in association with a control message addressed and transmitted from the first device to the second device, and specifying a non-transmitted control message based on the read-out control message association information and the communication log.