Roger H

Thanks. I will implement the program and await the start up.

Based on the information provided by MrBill (and from reading the wikipedia article) I would agree that the problem is not noise. As to what could be running only at that time of year, I have no real idea. But I am convinced that the signals are coming from outside the house, because I have a whole house generator and I used it to conduct an experiment. Once last summer when the event viewer was showing that many of these signals were being received (even as many as two per second) I went to the transfer switch and cut off power to the house. The generator came on and restored power, and after everything had rebooted I restarted the event viewer and there were none of these X10 signals at all. I waited about half an hour and during that time the only events were the normal traffic from my own (Insteon) devices. I then went back to the transfer switch and restored utility power to the house. The generator shut down and immediately I began seeing that once again I was being flooded with these supposed X10 signals. So as I mentioned before, when these things start up again next summer I am going to call the power company. I only hope that I will be able to speak to someone who knows what I am talking about.

I also have had the same issue for the past two summers. The ISY log shows thousands of what it thinks are X10 status requests for house code J. And I have no X10 devices at all, only Insteon. In my case the log entries start happening in early June and continue all summer until mid October. Then they stop completely. I see no "X10" entries all winter long. I also have a smart meter, and when this starts happening again next summer I plan to call the power company to talk about it.