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[EnergyPlus_Support] HELP!! E+ Simulation Crash - GetAirflowNetworkInput



Hello -

I started E+ with the AirflowNetwork3zVent example file, modified the geometry in OpenStudio (SketchUp) and then changed the HVAC to a heat pump system in the .idf editor.

After running the simulation several times, it keeps crashing during the AirflowNetworkInput.  I don't know what I'm doing wrong - I followed the example file closely to make sure everything was linked correctly (i.e. AirflowNetwork:Multizone:Surface <-> AirflowNetwork:Multizone:ExternalNode.  Below is the severe error I keep getting.

   ** Severe  ** GetAirflowNetworkInput: Currently only one ("1") AirLoopHVAC object per simulation is allowed when using AirflowNetwork Distribution Systems
   ** Severe  ** GetAirflowNetworkInput: AirflowNetwork:MultiZone:Surface: Invalid External Node Name =
   **   ~~~   ** A valid External Node Name is required when Wind Pressure Coefficient Type = Input

For the first error, does anyone know where the AirLoopHVAC objects are listed? (I think I only setup one) The second error seems self-explanatory, but I can't find anything wrong with the External Node Name.  Any ideas???

-Justin




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