shading in subsurface windows

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Hi I have started worked in open studio aplication, before i had worked with EP Lunch, when i want aplicate a shading control in windows i have some doubts:

• Is necessary draw blinds in the sketchup model?
• I create a construction window with blinds.
• When i create de shading appear the next error: The glass and gas layers in the shaded and unshaded constructions do not match for window=SUB SURFACE 1 Unshaded construction=ASHRAE 189.1-2009 EXTWINDOW CLIMATEZONE 3 Shaded construction=ASHRAE 189.1-2009 EXTWINDOW CLIMATEZONE 1

Regards.