Why Schedule:Fail:Shading failed to change the solar radiation

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Hello.

I am trying to model adaptive external shading. I tried to use Imported Shading Calculation Method to simulate the external shading. The Enerygplus model itself did not have any shading at all.

The eplusshading.csv result showed that the external sunlit data was read (same sunlit result with external sunlit data). But, the solar radiation result suggested as if the Imported shading was failed.

I set the shading frequency method and frequency as Timestep and 1. The Sky Diffuse Modelling Algorithm was set as Detailed Sky Diffuse Modelling. So, I am not sure why is it.

Any idea why?