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Node Connection Error: non-parent inlet node

I'm modeling a unglazed transpired solar collector that is connected to a air-to-air heat exchanger that flows into the outdoor air mixer.

The air that I am receiving is below. Is there any insight as to the root of the problem?

* Severe * Node Connection Error, Node="AIR INTAKE NODE", The same node appears as a non-parent Inlet node more than once. * ~~~ * Reference Object=SOLARCOLLECTOR:UNGLAZEDTRANSPIRED, Name=JH UTSC * ~~~ * Reference Object=HEATEXCHANGER:AIRTOAIR:SENSIBLEANDLATENT, Name=AIR-TO-AIR HX * Severe * Node Connection Error, Node="AIR OUTLET NODE", The same node appears as a non-parent Outlet node more than once. * ~~~ * Reference Object=SOLARCOLLECTOR:UNGLAZEDTRANSPIRED, Name=JH UTSC * ~~~ * Reference Object=HEATEXCHANGER:AIRTOAIR:SENSIBLEANDLATENT, Name=AIR-TO-AIR HX *** There were 2 node connection errors noted.

Node Connection Error: non-parent inlet node

I'm modeling a unglazed transpired solar collector that is connected to a air-to-air heat exchanger that flows into the outdoor air mixer.

The air that I am receiving is below. Is there any insight as to the root of the problem?

* Severe * Node Connection Error, Node="AIR INTAKE NODE", The same node appears as a non-parent Inlet node more than once. * ~~~ * Reference Object=SOLARCOLLECTOR:UNGLAZEDTRANSPIRED, Name=JH UTSC * ~~~ * Reference Object=HEATEXCHANGER:AIRTOAIR:SENSIBLEANDLATENT, Name=AIR-TO-AIR HX * Severe * Node Connection Error, Node="AIR OUTLET NODE", The same node appears as a non-parent Outlet node more than once. * ~~~ * Reference Object=SOLARCOLLECTOR:UNGLAZEDTRANSPIRED, Name=JH UTSC * ~~~ * Reference Object=HEATEXCHANGER:AIRTOAIR:SENSIBLEANDLATENT, Name=AIR-TO-AIR HX *** There were 2 node connection errors noted.