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Hello,

I implemented a HVAC-System in my building with four thermal zones. For that I built an air loop, a hot water loop, a chilled water loop and a condenser loop. Every coil are attached to their water loop. But as I want to run the simulation the following error appears:

Program Version,EnergyPlus, Version 9.2.0-921312fa1d, YMD=2019.12.15 18:30,
** Severe  ** <root>[Coil:Cooling:Water][Coil Cooling Water 1] - Missing required property 'air_inlet_node_name'.
** Severe  ** <root>[Coil:Cooling:Water][Coil Cooling Water 1] - Missing required property 'air_outlet_node_name'.
** Severe  ** <root>[Coil:Heating:Water][Coil Heating Water 1] - Missing required property 'air_inlet_node_name'.
** Severe  ** <root>[Coil:Heating:Water][Coil Heating Water 1] - Missing required property 'air_outlet_node_name'.
**  Fatal  ** Errors occurred on processing input file. Preceding condition(s) cause termination.
...Summary of Errors that led to program termination:
..... Reference severe error count=4
..... Last severe error=<root>[Coil:Heating:Water][Coil Heating Water 1] - Missing required property 'air_outlet_node_name'.
************* Warning:  Node connection errors not checked - most system input has not been read (see previous warning).
************* Fatal error -- final processing.  Program exited before simulations began.  See previous error messages.
************* EnergyPlus Warmup Error Summary. During Warmup: 0 Warning; 0 Severe Errors.
************* EnergyPlus Sizing Error Summary. During Sizing: 0 Warning; 0 Severe Errors.
************* EnergyPlus Terminated--Fatal Error Detected. 0 Warning; 4 Severe Errors; Elapsed Time=00hr 00min  0.45sec

I am a beginner and follow the steps of the book "Building Energy Modeling with OpenStudio" at checkpoint 7.

Does anyone know where the problem is and can help me please?

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Missing required property 'air_inlet_node_name' Hello, I implemented a HVAC-System in my building with four thermal zo