Specific error information is not necessary, I just need to know if the group Query came back successful, or if any of the devices failed to be properly queried. I don't need to know which device failed the query - though it would be nice - just if the query failed. I am using my insteon hardware and ISY controller to perform device control that simulates occupancy in a test home. Ovens/lights/showers/etc. come on/off on a regular schedule that mimics the actions of a home occupied by four people. Then certain equipment, for instance a variety of HVAC systems, are tested under conditions generated by the simulated occupancy. Because regular and repeatable patterns are necessary to compare the performance of different HVAC systems, it is important that the occupancy schedule runs correctly every day. On occasion I’ve come into the test home to see that the ISY could not communicate with a particular device for some reason. I would like to know when this happens and figured an occasional query would let me know about such failures. If you have some other methodology that would give me this type of information - via email notification - I’d be interested in giving it a try.