Regarding adding construction materials to skylight.

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Hello there, I have constructed an one-storied office building and conducting some analysis on it @ OpenStudio. Everything is going well so far except for construction material addition for skylight. I have selected ASHRAE 90.1.2020 and whenever I select a construction material for the skylights in my conference room, it takes around 10 minutes for the construction to be applied. Have any of you faced the same problem and found a way out?? Thanks in advance.