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Solved: ETABS License Not Recognized (Error 120) – The Ultimate Fix Guide

There are few things more frustrating than being in the middle of a tight deadline, ready to run a complex analysis, only to be stopped dead in your tracks by a licensing error. If you are staring at your screen seeing "Error 120: License not recognized" (or similar variations like "License not found" or "Dongle not recognized"), take a deep breath.