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Anyone know why these warnings are showing?

I defined two zones, one within the other.

Program Version,EnergyPlus, Version 9.2.0-921312fa1d, YMD=2024.02.04 20:05,
   ** Warning ** CalculateZoneVolume: The Zone="OUTER ZONE" is not fully enclosed. To be fully enclosed, each edge of a surface must also be an edge on one other surface.
   **   ~~~   **   The zone volume was calculated using the opposite wall area times the distance between them method 
   **   ~~~   **   The surface    "iz-INNERZONE WALL 1" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 1.0000, 1.0000, 0.0000}
   **   ~~~   **     Vertex end   { 1.0000, 4.5000, 0.0000}
   **   ~~~   **   The surface    "iz-INNERZONE WALL 2" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 5.0000, 1.0000, 0.0000}
   **   ~~~   **     Vertex end   { 1.0000, 1.0000, 0.0000}
   **   ~~~   **   The surface    "iz-INNERZONE WALL 3" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 5.0000, 4.5000, 0.0000}
   **   ~~~   **     Vertex end   { 5.0000, 1.0000, 0.0000}
   **   ~~~   **   The surface    "iz-INNERZONE WALL 4" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 1.0000, 4.5000, 0.0000}
   **   ~~~   **     Vertex end   { 5.0000, 4.5000, 0.0000}

Anyone know Can anyone help me understand why I'm encountering these warnings are showing?warnings?

I defined two zones, one within the other.another one.

Program Version,EnergyPlus, Version 9.2.0-921312fa1d, YMD=2024.02.04 20:05,
   ** Warning ** CalculateZoneVolume: The Zone="OUTER ZONE" is not fully enclosed. To be fully enclosed, each edge of a surface must also be an edge on one other surface.
   **   ~~~   **   The zone volume was calculated using the opposite wall area times the distance between them method 
   **   ~~~   **   The surface    "iz-INNERZONE WALL 1" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 1.0000, 1.0000, 0.0000}
   **   ~~~   **     Vertex end   { 1.0000, 4.5000, 0.0000}
   **   ~~~   **   The surface    "iz-INNERZONE WALL 2" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 5.0000, 1.0000, 0.0000}
   **   ~~~   **     Vertex end   { 1.0000, 1.0000, 0.0000}
   **   ~~~   **   The surface    "iz-INNERZONE WALL 3" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 5.0000, 4.5000, 0.0000}
   **   ~~~   **     Vertex end   { 5.0000, 1.0000, 0.0000}
   **   ~~~   **   The surface    "iz-INNERZONE WALL 4" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 1.0000, 4.5000, 0.0000}
   **   ~~~   **     Vertex end   { 5.0000, 4.5000, 0.0000}

Can anyone help me understand why I'm encountering these warnings?

I defined two zones, one within the another one.

Program Version,EnergyPlus, Version 9.2.0-921312fa1d, YMD=2024.02.04 20:05,
   ** Warning ** CalculateZoneVolume: The Zone="OUTER ZONE" is not fully enclosed. To be fully enclosed, each edge of a surface must also be an edge on one other surface.
   **   ~~~   **   The zone volume was calculated using the opposite wall area times the distance between them method 
   **   ~~~   **   The surface    "iz-INNERZONE WALL 1" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 1.0000, 1.0000, 0.0000}
   **   ~~~   **     Vertex end   { 1.0000, 4.5000, 0.0000}
   **   ~~~   **   The surface    "iz-INNERZONE WALL 2" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 5.0000, 1.0000, 0.0000}
   **   ~~~   **     Vertex end   { 1.0000, 1.0000, 0.0000}
   **   ~~~   **   The surface    "iz-INNERZONE WALL 3" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 5.0000, 4.5000, 0.0000}
   **   ~~~   **     Vertex end   { 5.0000, 1.0000, 0.0000}
   **   ~~~   **   The surface    "iz-INNERZONE WALL 4" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 1.0000, 4.5000, 0.0000}
   **   ~~~   **     Vertex end   { 5.0000, 4.5000, 0.0000}

Can anyone help me understand why I'm encountering these warnings?

I want to simulate an indoor walk-in freezer in the inner zone with constant boundary conditions, unaffected by outdoor conditions. So I defined two zones, one within the another one.other.

Program Version,EnergyPlus, Version 9.2.0-921312fa1d, YMD=2024.02.04 20:05,
   ** Warning ** CalculateZoneVolume: The Zone="OUTER ZONE" is not fully enclosed. To be fully enclosed, each edge of a surface must also be an edge on one other surface.
   **   ~~~   **   The zone volume was calculated using the opposite wall area times the distance between them method 
   **   ~~~   **   The surface    "iz-INNERZONE WALL 1" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 1.0000, 1.0000, 0.0000}
   **   ~~~   **     Vertex end   { 1.0000, 4.5000, 0.0000}
   **   ~~~   **   The surface    "iz-INNERZONE WALL 2" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 5.0000, 1.0000, 0.0000}
   **   ~~~   **     Vertex end   { 1.0000, 1.0000, 0.0000}
   **   ~~~   **   The surface    "iz-INNERZONE WALL 3" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 5.0000, 4.5000, 0.0000}
   **   ~~~   **     Vertex end   { 5.0000, 1.0000, 0.0000}
   **   ~~~   **   The surface    "iz-INNERZONE WALL 4" has an edge that is either not an edge on another surface or is an edge on three or more surfaces: 
   **   ~~~   **     Vertex start { 1.0000, 4.5000, 0.0000}
   **   ~~~   **     Vertex end   { 5.0000, 4.5000, 0.0000}