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Low Temperature Radiant Error with Surfaces

I am having an issue with modeling low temperature radiant var flow in OS. Running OS 2.8.0. I am getting the following error: * Severe * ZoneHVAC:LowTemperatureRadiant:SurfaceGroup = LOW TEMP RADIANT VAR FLOWFLOORS does not have any surfaces listed. * Severe * ZoneHVAC:LowTemperatureRadiant:SurfaceGroup flow fractions do not add up to unity for LOW TEMP RADIANT VAR FLOWFLOORS * Severe * ZoneHVAC:LowTemperatureRadiant:SurfaceGroup errors found getting input. Program will terminate. * Fatal * GetSurfaceListsInputs: Program terminates due to preceding conditions.

I have the Radiant Surface Type set to floors but still get this error. This zone is ground level and the boundary is set to ground. Any suggestions would be appreciated.