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[EnergyPlus_Support] Warning Message shown as Zone XXX is not accounted for by controller:mechnicalv"

Hi,all,

Although I can successfully run a simulation, I received several warning messages in the error log as
 
"   ** Warning ** Zone name = PERIM_BOT_ZN_7 is not accounted for by Controller:MechanicalVentilation object name = PACU_VAV_BOT_DCV
   **   ~~~   ** Ventilation per unit floor area has not been specified for this zone, which is connected to
   **   ~~~   ** the air loop served by Controller:OutdoorAir = PACU_VAV_BOT_OA_CONTROLLER. Simulation will continue...
   ** Warning ** PEOPLE object for zone = PERIM_BOT_ZN_7 is not accounted for by Controller:MechanicalVentilation object name = PACU_VAV_BOT_DCV
   **   ~~~   ** A "PEOPLE" object has been specified in the idf for this zone, but it is not included in this Controller:MechanicalVentilation Object.
   **   ~~~   ** Check Controller:MechanicalVentilation object. Simulation will continue.
** Warning ** Zone name = PERIM_MID_ZN_8 is not accounted for by Controller:MechanicalVentilation object name = PACU_VAV_MID_DCV
   **   ~~~   ** Ventilation per unit floor area has not been specified for this zone, which is connected to
   **   ~~~   ** the air loop served by Controller:OutdoorAir = PACU_VAV_MID_OA_CONTROLLER. Simulation will continue...
   ** Warning ** PEOPLE object for zone = PERIM_MID_ZN_8 is not accounted for by Controller:MechanicalVentilation object name = PACU_VAV_MID_DCV
   **   ~~~   ** A "PEOPLE" object has been specified in the idf for this zone, but it is not included in this Controller:MechanicalVentilation Object.
   **   ~~~   ** Check Controller:MechanicalVentilation object. Simulation will continue.
   ** Warning ** Zone name = PERIM_TOP_ZN_8 is not accounted for by Controller:MechanicalVentilation object name = PACU_VAV_TOP_DCV
   **   ~~~   ** Ventilation per unit floor area has not been specified for this zone, which is connected to
   **   ~~~   ** the air loop served by Controller:OutdoorAir = PACU_VAV_TOP_OA_CONTROLLER. Simulation will continue...
   ** Warning ** PEOPLE object for zone = PERIM_TOP_ZN_8 is not accounted for by Controller:MechanicalVentilation object name = PACU_VAV_TOP_DCV
   **   ~~~   ** A "PEOPLE" object has been specified in the idf for this zone, but it is not included in this Controller:MechanicalVentilation Object."

The building I simulated has 27 conditioned zones in total, but only those three zones shown up in the warning. I checked the classes of "DesignSpecification: OutdoorAir" for those zones, they are properly specified, and the object of "Controller:MechanicalVentilation" looks like this:

Controller:MechanicalVentilation,
    PACU_VAV_BOT_DCV,        !- Name
    ALWAYS_ON,               !- Availability Schedule Name
    Yes,                     !- Demand Controlled Ventilation
    VentilationRateProcedure,!- System Outdoor Air Method
    Core_bottom,             !- Zone 1 Name
    CM DSOA Core_bottom,     !- Design Specification Outdoor Air Object Name 1
    1,                       !- Zone Air Distribution Effectiveness in Cooling Mode 1 {dimensionless}
    1,                       !- Zone Air Distribution Effectiveness in Heating Mode 1 {dimensionless}
    ,                        !- Zone Air Distribution Effectiveness Schedule Name 1
    Perim_bot_ZN_1,          !- Zone 2 Name
    CM DSOA Perim_bot_ZN_1,  !- Design Specification Outdoor Air Object Name 2
    1,                       !- Zone Air Distribution Effectiveness in Cooling Mode 2 {dimensionless}
    1,                       !- Zone Air Distribution Effectiveness in Heating Mode 2 {dimensionless}
    ,                        !- Zone Air Distribution Effectiveness Schedule Name 2
    Perim_bot_ZN_2,          !- Zone 3 Name
    CM DSOA Perim_bot_ZN_2,  !- Design Specification Outdoor Air Object Name 3
    1,                       !- Zone Air Distribution Effectiveness in Cooling Mode 3 {dimensionless}
    1,                       !- Zone Air Distribution Effectiveness in Heating Mode 3 {dimensionless}
    ,                        !- Zone Air Distribution Effectiveness Schedule Name 3
    Perim_bot_ZN_3,          !- Zone 4 Name
    CM DSOA Perim_bot_ZN_3,  !- Design Specification Outdoor Air Object Name 4
    1,                       !- Zone Air Distribution Effectiveness in Cooling Mode 4 {dimensionless}
    1,                       !- Zone Air Distribution Effectiveness in Heating Mode 4 {dimensionless}
    ,                        !- Zone Air Distribution Effectiveness Schedule Name 4
    Perim_bot_ZN_4,          !- Zone 5 Name
    CM DSOA Perim_bot_ZN_4,  !- Design Specification Outdoor Air Object Name 5
    1,                       !- Zone Air Distribution Effectiveness in Cooling Mode 5 {dimensionless}
    1,                       !- Zone Air Distribution Effectiveness in Heating Mode 5 {dimensionless}
    ,                        !- Zone Air Distribution Effectiveness Schedule Name 5
    Perim_bot_ZN_5,          !- Zone 6 Name
    CM DSOA Perim_bot_ZN_5,  !- Design Specification Outdoor Air Object Name 6
    1,                       !- Zone Air Distribution Effectiveness in Cooling Mode 6 {dimensionless}
    1,                       !- Zone Air Distribution Effectiveness in Heating Mode 6 {dimensionless}
    ,                        !- Zone Air Distribution Effectiveness Schedule Name 6
    Perim_bot_ZN_6,          !- Zone 7 Name
    CM DSOA Perim_bot_ZN_6,  !- Design Specification Outdoor Air Object Name 7
    1,                       !- Zone Air Distribution Effectiveness in Cooling Mode 7 {dimensionless}
    1,                       !- Zone Air Distribution Effectiveness in Heating Mode 7 {dimensionless}
    ,                        !- Zone Air Distribution Effectiveness Schedule Name 7
    Perim_bot_ZN_8,          !- Zone 8 Name
    CM DSOA Perim_bot_ZN_8,  !- Design Specification Outdoor Air Object Name 8
    1,                       !- Zone Air Distribution Effectiveness in Cooling Mode 8 {dimensionless}
    1,                       !- Zone Air Distribution Effectiveness in Heating Mode 8 {dimensionless}
    ,                        !- Zone Air Distribution Effectiveness Schedule Name 8
    Perim_bot_ZN_7,          !- Zone 9 Name
    CM DSOA Perim_bot_ZN_7,  !- Design Specification Outdoor Air Object Name 9
    1,                       !- Zone Air Distribution Effectiveness in Cooling Mode 9 {dimensionless}
    1;                       !- Zone Air Distribution Effectiveness in Heating Mode 9 {dimensionless}


Something really odd is that all three zones with warning message appear at the end of the object of "controller:mechanicalventilation", and I tried to change the order of the zones under the controller, and found out that whichever zone sits in the end will show up in the warning message.
Can anyone explain to me why this warning occurs? and How to fix this?  I worried about that those zones are not properly accounted as suggested by the warning message! 

Thanks in advance.

Ke



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