This is a communication error. There are two thpes os serial cable. You are using a straight thru cable you need a "null modem cable or you will get no communication. Confirmed. our serial cable needs to be a crossover "null Modem" type if I remember correctly. you probably have a straight through cable which wont work. Also make sure you are using the correct port number for your serial converter (often port 4). Check it in device manager.
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