Error when using PTHP

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I'm trying to use the PTHP system to make redundancy to a chilled water coil in a IT Room.

To run the simulation with PTHP, the below error occurs indicating that there is an absence of filling in the fields Air Inlet Air Outlet Node Name and Node Name.

However, I do not understand where to set these nodes.

Is this a bug or am I making a mistake?

   *************  47938 Fan:ConstantVolume,
   ************* indicated Name=Fan Constant Volume
   ************* Only last 9 lines before error line shown.....
   *************  47939   Fan Constant Volume,                    !- Name
   *************  47940   Always On Discrete 1,                   !- Availability Schedule Name
   *************  47941   0.7,                                    !- Fan Total Efficiency
   *************  47942   250,                                    !- Pressure Rise {Pa}
   *************  47943   AutoSize,                               !- Maximum Flow Rate {m3/s}
   *************  47944   0.9,                                    !- Motor Efficiency
   *************  47945   1,                                      !- Motor In Airstream Fraction
   *************  47946   ,                                       !- Air Inlet Node Name
   *************  47947   ;                                       !- Air Outlet Node Name