Energy Plus API variable handles

[philip-ba]

Hello,
Im using the EnergyPlus API to add additional inputs to the simulation. Therefore I request E+ variables using the Exchange API.
I cannot find the handles for the following variables:
"Site Sky Temperature", "Environment"
"Surface Outside Face Thermal Radiation to Sky Heat Transfer Coefficient", surface_name
"Site Outdoor Air Drybulb Temperature", "Environment"
"Site Total Sky Cover", "Environment"

I used list_available_api_data_csv(state) after api_data_fully_ready(state) to generate the available variables. If I search the csv I dont get any results for key words like sky, ...

Is a request as a output variable necessary to call the variable during simulation?

Many thanks to any help!!

[philip-ba]

Update: I added the stated variables to the requested outputs and they are mentioned in the csv file. My own logger in the API with if handle == -1: ->raise RuntimeError is NOT triggered.
But the .err File still says "Data Exchange API: Index error in getVariableValue; received handle: -1".

[philip-ba]

Solution: Variables need to be requested as an output before. However Surface Outside Face Thermal Radiation to Sky Heat Transfer Coefficient in particular is not calculated for adiabatic surfaces and therefore does not exist.