Node error how can i define it and rectify the error because the remaining zones are not showing any error..

* Severe * InitZoneAirSetpoints: Zone="7788C8" has specified a Thermostatic control but is not a controlled zone. * ~~~ * ...must have a ZoneHVAC:EquipmentConnections specification for this zone. * Fatal * InitZoneAirSetpoints - program terminates due to previous condition. ...Summary of Errors that led to program termination: ..... Reference severe error count=1 ..... Last severe error=InitZoneAirSetpoints: Zone="7788C8" has specified a Thermostatic control but is not a controlled zone. *** Warning: Node connection errors not checked - most system input has not been read (see previous warning).

Hi @saravanan17

It looks like you added a "ZoneControl:Thermostat" to the zone "7788C8" but did not assign any zone HVAC equipment to this zone. Is this zone supposed to be connected to some sort of HVAC equipment?

If yes, you would need to add the relevant objects for "ZoneHVAC:EquipmentList" and "ZoneHVAC:EquipmentConnections" to the zone. (the relevant zone HVAC equipment would need to be added to the overall system branches if required)

If no, then you would need to delete the thermostat for this zone to be able to run the model.