[EnergyPlus_Support] Invalid Component name error

["JV Dirkes II" <jvd2pe@xxxxxxx>]

Dear E+ Support Group,

I received the error message below, and cannot determine why
"ZONE1_HP1" might be invalid.  The only objects which use that name,
other than Surfaces are also shown below.

Your assistance will be appreciated!

   ** Severe  ** During Branch Input, Invalid Component Name
input=ZONE1_HP1
   **   ~~~   ** Component type=COMPACT HVAC:ZONE:UNITARY
   **   ~~~   ** Occurs on Branch=BRANCH_AIRLOOP_HP1


BRANCH,
    Branch_AirLoop_HP1,      !- Branch Name
    autosize,                !- Maximum Branch Flow Rate {m3/s}
    OUTSIDE AIR SYSTEM,      !- Comp1 Type
    OASystem_HP1,            !- Comp1 Name
    NodeIn_RA_HP1,           !- Comp1 Inlet Node Name
    NodeOut_MA_HP1,          !- Comp1 Outlet Node Name
    PASSIVE,                 !- Comp1 Branch Control Type
    Compact HVAC:Zone:Unitary,  !- Comp2 Type
    Zone1_HP1,               !- Comp2 Name
    NodeOut_MA_HP1,          !- Comp2 Inlet Node Name
    NodeOut_SupplHtg_HP1,    !- Comp2 Outlet Node Name
    ACTIVE;                  !- Comp2 Branch Control Type

ZONE,
    Zone1_HP1,               !- Zone Name

COMPACT HVAC:SYSTEM:UNITARY,
    AHU_1,                   !- Air Handling System Name
    Sch_Comp_HtgAvail_HP1,   !- System Availability Schedule
    Zone1_HP1,               !- Control Zone Name or Thermostat Location

COMPACT HVAC:ZONE:UNITARY,
    Zone1_HP1,               !- Zone Name
    AHU_1,                   !- Air Handling System Name




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