Digger, one thing I will add is that your symptoms sound a lot like mine. I thought the Elk and the controller were on a dead circuit and started blaming the power conditioners/UPS's, etc.
The issues seemed to go away after I got to a certain number of switches (although to your point you should not need 20 for this to work).
Dave > Thank you. I'm not sure what was going on Saturday night, but it seems to be ok now whatever it was. The messages in the SDM were completely different on Sunday as opposed to what I saw on Saturday. Only thing I can think of was I was trying different serial ports towards the end of the night, maybe I did not run the tests properly after changing it late in the evening (and there is some issue with the other serial port).
The issues seemed to go away after I got to a certain number of switches (although to your point you should not need 20 for this to work).
Dave > Thank you. I'm not sure what was going on Saturday night, but it seems to be ok now whatever it was. The messages in the SDM were completely different on Sunday as opposed to what I saw on Saturday. Only thing I can think of was I was trying different serial ports towards the end of the night, maybe I did not run the tests properly after changing it late in the evening (and there is some issue with the other serial port).