Thanks for the response. When I really thought about the issue it came down to either the ISY or PLM as it did work before, was a program and not a scene, and was control trigger related. I realized I rebooted the ISY but never the PLM. Did that and now all works fine again. Duh! Nothing like missing the obvious but it did help focus the differences between scene links (device to device) vs. programs (ISY generated based on an internal or external condition) so all was not in vain.