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For Seismic Design Categories D, E or F with vertical irregularity 5b (Extreme Weak Story), and SDC E or F with horizontal irregularity 1b (Extreme Torsional) or vertical irregularities 1b (Extreme Soft Story) or 5a (Weak Story), the program warns you that the Equivalent Lateral Procedure (ELF) is not permitted by ASCE 7 12.3.3.1. If only the horizontal Torsional irregularity 1b exists, this applies only if rigid diaphragm design is selected.
Design results are still output for your information, but prominent warnings appear on the screen, in the Site Dialog, and in the Design Results Output indicating that the results are not valid for design.