When assigning zones into a multiplex my zone is not shown on the dropdown list

When assigning HVAC zones into an ApacheHVAC system multiplex Principal Room then only zones where the Master Room is Conditioned are able to be assigned.

You can check this setting for your zones in the Apache (or 90.1 PRM, NECB etc) application view by querying either the room or the zone. The conditioned status is shown on the System tab of Room Data and on the Zone Data. If this is set to Conditioned? No free floating then the Room or Zone is not eligible for assignment to a principal room in an ApacheHVAC network (but may be assigned to a non-principal room for instance to allow the room to have air transferred to it from the conditioned room)

Room data:

Zone data:

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