I can not find the zone air inlet node in the library in Openstudio's HVAC tab. It is causing a severe error when running the simulation.

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How do I solve the following error?

** Severe  ** sizeZoneSpaceEquipmentPart1: to account for the effect a Dedicated Outside Air System on zone equipment sizing
**   ~~~   ** there must be at least one zone air inlet node
**  Fatal  ** Previous severe error causes abort 
...Summary of Errors that led to program termination:

Thanks