Hi @HamidrezaSh ,
I was able to implement a fix that has gotten the simulation to run:
You can get the fix now by running the LB Versioner component with nothing connected to the version_.
At a glance, the results are looking pretty reasonable to me. The EUI for a simple office is lower than the equivalent system with FCUs and the radiant metal panel performs a bit better than the default radiant slab:
Radiant_CWM.gh (70.0 KB)
Furthermore, there are few, if any, unmet hours.
I think there might have been a lot of improvements to the radiant system controls in EnergyPlus that have enabled me to remove some of the workarounds that we were using previously in OpenStudio Standards. I’ll check with Matt Dalhausen, who maintains OpenStudio Standards, to be sure. But I think this should be good enough to unblock you for now.