Hi - following the walkout basement example for KIVA provided with EnergyPlus I am getting the following error when I remove vertical and horizontal insulation from the Foundation:Kiva object.

 Program Version,EnergyPlus, Version 9.4.0-998c4b761e, YMD=2021.06.23 22:13,
   ** Severe  ** Kiva: A cell has been assigned to multiple surfaces.
   **  Fatal  ** Kiva: Errors discovered, program terminates.

I can circumvent the issue by using 1mm of insulation as shown below. But what if I don’t want to model insulation? When I remove the ground coupled basement walls and just set their boundary condition to “ground” the error goes away but I suppose Kiva will work with incorrect section profiles as it does not know about the walls anymore.

Foundation:Kiva,
    KIVA_Zone_0,             !- Name
    ,                        !- Initial Indoor Air Temperature {C}
    Basement Insulation,     !- Interior Horizontal Insulation Material Name
    ,                        !- Interior Horizontal Insulation Depth {m}
    0.001,                   !- Interior Horizontal Insulation Width {m}
    ,                        !- Interior Vertical Insulation Material Name
    ,                        !- Interior Vertical Insulation Depth {m}
    ,                        !- Exterior Horizontal Insulation Material Name
    ,                        !- Exterior Horizontal Insulation Depth {m}
    ,                        !- Exterior Horizontal Insulation Width {m}
    Basement Insulation,     !- Exterior Vertical Insulation Material Name
    0.001,                     !- Exterior Vertical Insulation Depth {m}
    0.001,                     !- Wall Height Above Grade {m}
    0.001;                     !- Wall Depth Below Slab {m}

And what is the best way to troubleshoot the above error. Is there a way to export the FE slices/profiles and take a look at them?

Hi - following the walkout basement example for KIVA provided with EnergyPlus I am getting the following error when I remove vertical and horizontal insulation from the Foundation:Kiva object.

 Program Version,EnergyPlus, Version 9.4.0-998c4b761e, YMD=2021.06.23 22:13,
   ** Severe  ** Kiva: A cell has been assigned to multiple surfaces.
   **  Fatal  ** Kiva: Errors discovered, program terminates.

I can circumvent the issue by using 1mm of insulation as shown below. But what if I don’t want to model insulation? When I remove the ground coupled basement walls and just set their boundary condition to “ground” the error goes away but I suppose Kiva will work with incorrect section profiles as it does not know about the walls anymore.

Foundation:Kiva,
    KIVA_Zone_0,             !- Name
    ,                        !- Initial Indoor Air Temperature {C}
    Basement Insulation,     !- Interior Horizontal Insulation Material Name
    ,                        !- Interior Horizontal Insulation Depth {m}
    0.001,                   !- Interior Horizontal Insulation Width {m}
    ,                        !- Interior Vertical Insulation Material Name
    ,                        !- Interior Vertical Insulation Depth {m}
    ,                        !- Exterior Horizontal Insulation Material Name
    ,                        !- Exterior Horizontal Insulation Depth {m}
    ,                        !- Exterior Horizontal Insulation Width {m}
    Basement Insulation,     !- Exterior Vertical Insulation Material Name
    0.001,                     !- Exterior Vertical Insulation Depth {m}
    0.001,                     !- Wall Height Above Grade {m}
    0.001;                     !- Wall Depth Below Slab {m}

And what is the best way to troubleshoot the above error. Is there a way to export the FE slices/profiles and take a look at them?

Hi - following the walkout basement example for KIVA provided with EnergyPlus I am getting the following error when I remove vertical and horizontal insulation from the Foundation:Kiva object.

 Program Version,EnergyPlus, Version 9.4.0-998c4b761e, YMD=2021.06.23 22:13,
   ** Severe  ** Kiva: A cell has been assigned to multiple surfaces.
   **  Fatal  ** Kiva: Errors discovered, program terminates.

I can circumvent the issue by either assigning each surface with it's own Foundation:KIVA object or by using 1mm of insulation as shown below. But what if I don’t want to model insulation? When I remove the ground coupled basement walls and just set their boundary condition to “ground” the error goes away but I suppose Kiva will work with incorrect section profiles as it does not know about the walls anymore.below.

Foundation:Kiva,
    KIVA_Zone_0,             !- Name
    ,                        !- Initial Indoor Air Temperature {C}
    Basement Insulation,     !- Interior Horizontal Insulation Material Name
    ,                        !- Interior Horizontal Insulation Depth {m}
    0.001,                   !- Interior Horizontal Insulation Width {m}
    ,                        !- Interior Vertical Insulation Material Name
    ,                        !- Interior Vertical Insulation Depth {m}
    ,                        !- Exterior Horizontal Insulation Material Name
    ,                        !- Exterior Horizontal Insulation Depth {m}
    ,                        !- Exterior Horizontal Insulation Width {m}
    Basement Insulation,     !- Exterior Vertical Insulation Material Name
    0.001,                     !- Exterior Vertical Insulation Depth {m}
    0.001,                     !- Wall Height Above Grade {m}
    0.001;                     !- Wall Depth Below Slab {m}

Now I am wondering what KIVA does when I assign each surface its own "Foundation:Kiva" object. Is that still a valid setup? And what is the best way to troubleshoot the above error. Is there a way to export the FE slices/profiles and take a look at them?