You are not alone. This is one of the most common issues users face with CSI software (ETABS, SAP2000, SAFE, and CSiBridge). Whether you are using a hardware key (dongle) or a network license, this guide will walk you through exactly why this happens and how to fix it so you can get back to "work."
ETABS relies on "Sentinel" drivers to read the USB key. If these drivers are outdated or missing, Error 120 occurs. etabs license not recognized error 120 work