I’m trying to ping a GKC to a piece matching this expression {Row==ActiveRow&&Half==HalfCur}. Row and Half being Markers the piece have, ActiveRow and HalfCur being Global Properties set either earlier in the same click or, in testing, even earlier. Is that a valid expression to search for? I think it is but I have no clue why the message wouldn’t be getting through otherwise.
This is correct expression. I’ve made test module with your formula, and it’s working as expected. You can investigate it: drive.google.com/file/d/16A0K3k … sp=sharing
Try to add text labels, which show values of pieces’ markers and current values of your global properties (as I did in my module).