Goodmornig, I'm trying to model a ground source heat pump coupled with a radiant sytsem in Openstudio but i'm encountering some errors that i can't fix. Basically i'm following what suggested here (https://unmethours.com/question/4823/...) introducing my radiant system within the thermal zone and adding a ground heat exchager in the plant loop. With this configuration the model runs but it does not returns results of energy consumption: the energy consumption are set equal to 0. I think that the reason behind is because I have not added the heat pump but just the heat exchanger and the emission system. So I add a water to water heat pump but the simulation returns the error: Missing required property 'load_side_outlet_node_name'. Can someone help me showing where I wrong or giving some references? At the moment the model does not provide an air loop. Thank you very much