PROBLEM TO BE SOLVED: To reproduce simulation without receiving a message from another simulator, etc., by acquiring a message that a simulation executing time is matched with a receiving time in a recording means at the time of a reproducing mode. ;SOLUTION: At the time of receiving a message from a simulation manager 5 at the time of a recording mode, plural simulators 1 to 4 record the message in a simulator execution information managing means 9 and record a logical time showing its receiving time to send to a simulation main body 7 to execute simulation in accordance with the message. At the time of receiving a logical time showing the executing time of simulation from the manager 5 at the time of a reproducing mode, a simulator reproducing execution managing means 11 acquires a message that the receiving time is matched with the execution time from the means 9 and gives it to a simulation main body 7 to reproduce and execute simulation.;COPYRIGHT: (C)2000,JPO
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