The wind load generation did not take place because there were no closed panels on the windward or leeward faces of the structure. I added the FIXED supports at the base and created some dummy members along X direction, connecting the tops of the frames. I assigned 10 mm dia steel rods to these dummy members to make these different from the rest of the model. You may change these as needed. These changes resulted in formation of closed panels and the wind load is now being generated. A modified file is attached for your reference.
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