Simulating energyplus with the BCVTB interface - energyplus

Question

I have a openstudio model with 3 zones. We are using a python program to execute energyplus with the BCVTB interface. I got it to work on thermal zone 3 but not for thermal zone 1 and 2. I have the input variables defined in variables.cfg as: as:
<variable source="Ptolemy">
<energyplus <EnergyPlus schedule="Cooling TZ2 Setpoint Schedule"/>
</variable>
<variable source="Ptolemy">
<energyplus <EnergyPlus schedule="Heating TZ2 Setpoint Schedule"/>
</variable></variable>
But when I run the execution I seem to get no load on the Air Loop for thermal zone 2. I have a plant loop for district heating and district cooling and then Air Loops thermal zone 2.
Could use some help with this.
The Osm and idf file can be found here: https://drive.google.com/file/d/1TM6LfmL8KI7w0XFswB9GMTH-KJQE5D-m/view?usp=share_link
Output from energyplus:
Program Version,EnergyPlus, Version 22.1.0-ed759b17ee, YMD=2022.12.20 10:42,
************* Beginning Zone Sizing Calculations
** Warning ** SetUpDesignDay: Entered DesignDay Barometric Pressure=31000 differs by more than 10% from Standard Barometric Pressure=100201.
** ~~~ ** ...occurs in DesignDay=SIZING PERIOD DESIGN DAY 1, Standard Pressure (based on elevation) will be used.
** Warning ** ProcessScheduleInput: Schedule:Compact="ZONE CONTROL TYPE SCHED TZ2", Schedule Type Limits Name="ANY NUMBER" not found -- will not be validated
** Warning ** ProcessScheduleInput: Schedule:Constant="ALWAYS OFF DISCRETE", Blank Schedule Type Limits Name input -- will not be validated.
** Warning ** ProcessScheduleInput: Schedule:Constant="ALWAYS ON CONTINUOUS", Blank Schedule Type Limits Name input -- will not be validated.
** Warning ** ProcessScheduleInput: Schedule:Constant="ALWAYS OFF DISCRETE 1", Blank Schedule Type Limits Name input -- will not be validated.
** Warning ** ProcessScheduleInput: Schedule:Constant="ALWAYS ON CONTINUOUS 1", Blank Schedule Type Limits Name input -- will not be validated.
** Warning ** GetHTSurfaceData: Surfaces with interface to Ground found but no "Ground Temperatures" were input.
** ~~~ ** Found first in surface=SURFACE 7
** ~~~ ** Defaults, constant throughout the year of (18.0) will be used.
** Warning ** CheckUsedConstructions: There are 6 nominally unused constructions in input.
** ~~~ ** For explicit details on each unused construction, use Output:Diagnostics,DisplayExtraWarnings;
** Warning ** Calculated design cooling load for zone=THERMAL ZONE 2 is zero.
** ~~~ ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
** Warning ** Calculated design heating load for zone=THERMAL ZONE 2 is zero.
** ~~~ ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
************* Beginning System Sizing Calculations
** Warning ** ManageSizing: Calculated Cooling Design Air Flow Rate for System=AIR LOOP CLG TZ2 is zero.
** ~~~ ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
** Warning ** ManageSizing: Calculated Heating Design Air Flow Rate for System=AIR LOOP CLG TZ2 is zero.
** ~~~ ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
** Warning ** ManageSizing: Calculated Cooling Design Air Flow Rate for System=AIR LOOP HTG TZ2 is zero.
** ~~~ ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
** Warning ** ManageSizing: Calculated Heating Design Air Flow Rate for System=AIR LOOP HTG TZ2 is zero.
** ~~~ ** Check Sizing:Zone and ZoneControl:Thermostat inputs.
************* Beginning Plant Sizing Calculations
** Severe ** SizeAirLoopBranches: AirLoopHVAC AIR LOOP CLG TZ2 has air flow less than 1.0000E-003 m3/s.
** ~~~ ** Primary air system volumetric flow rate = 0.0000 m3/s.
** ~~~ ** Check flow rate inputs for components in this air loop and,
** ~~~ ** if autosized, check Sizing:Zone and Sizing:System objects and related inputs.
** Fatal ** Previous condition causes termination.
...Summary of Errors that led to program termination:
..... Reference severe error count=1
..... Last severe error=SizeAirLoopBranches: AirLoopHVAC AIR LOOP CLG TZ2 has air flow less than 1.0000E-003 m3/s.
************* Warning: Node connection errors not checked - most system input has not been read (see previous warning).
************* Fatal error -- final processing. Program exited before simulations began. See previous error messages.
*************
************* ===== Final Error Summary =====
************* The following error categories occurred. Consider correcting or noting.
************* Nominally Unused Constructions
************* ..The nominally unused constructions warning is provided to alert you to potential conditions that can cause
************* ..extra time during simulation. Each construction is calculated by the algorithm indicated in the HeatBalanceAlgorithm
************* ..object. You may remove the constructions indicated (when you use the DisplayExtraWarnings option).
*************
************* EnergyPlus Warmup Error Summary. During Warmup: 0 Warning; 0 Severe Errors.
************* EnergyPlus Sizing Error Summary. During Sizing: 14 Warning; 0 Severe Errors.
************* EnergyPlus Terminated--Fatal Error Detected. 14 Warning; 1 Severe Errors; Elapsed Time=00hr 00min 0.14sec
Thanks
I tried to run a simulation of the 3 thermal zones building using the BCVTB interface of energyplus. I expected the simulation to work since I defined the input variables in the variables.cfg file.