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

A communication error information output method outputting processing of information associated with a communication error, comprising:

• 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;
• executing a non-transmitted control message specifying 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 identification information of 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 obtained;
• and
• outputting a control message information including information associated with the non-transmitted control message specified in the non-transmitted control message specifying.

A communication error information output device for outputting information associated with a communication error, comprising:

• a communication log obtaining unit 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 unit 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 identification information of 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 obtained;
• and
• a control message information output unit outputting information associated with the non-transmitted control message specified in the non-transmitted control message specifying unit.

A method of outputting information associated with a communication error, comprising:

• associating a control message from a first device to a second device with a message between the second device and a third device;
• maintaining a log of each communication message delivered between the second device and the third device based on a message from the first device;
• and
• indicating a location of a communication error based on the log and data resulting from said associating.