Simulation: Send value from one block to another

[brisonsm@msn.com]

I am following the Climate Control Simulation Tutorial on YouTube by MBSE Execution (I think affiliated with No Magic). I am having a problem with my new SetPoint going from the Thermostat to the System in order to change the temperature. In my Send SetPoint I have an Opaque Action setting x = SetPoint and then the SetPoint Signal being sent on the Thermostat's port. In Update SetPoint, I have in temp being sent to another Opaque Action where SetPoint=s. Any idea of how to troubleshoot this? This is the tutorial I am following: https://www.youtube.com/watch?v=sdwJ93-wVFY