I am using radiance measure in OpenStudio and interior blinds on my model which is basically a cube with window on one side. In my simulations I am changing cube's shape and window orientation. When I changed cube measures to 12 times 36 feet with window on a short side pointed on north, the simulation failed. This happens only in case where the window is pointed on north. Simulation is successful with other orientations or other cube shapes (18 times 24, 24 times 18, 21 times 21, 36 times 12 feet). (ceiling height is the same in every case - 9 feet).
I am wondering why only this cube shape and north orientation is problematic.
