Are you using a license or a network license managed by a server? Licensing errors generated when running CSI software
Reboot the PC to clear temporary system hooks.
Running into the "License Not Recognized" error (often accompanied by Error 120 or similar codes) in ETABS is a frustrating hurdle for structural engineers. It typically indicates that the software cannot communicate with its license file, license server, or that the license itself has become invalid due to hardware changes, expiration, or date/time mismatches. etabs license not recognized error 120 work
Table_title: Licensing errors generated when running CSI software Table_content: header: | Error Code | Problem Description | row: CSI Knowledge Base Licensing errors generated when running CSI software
Error 122 ("SentinelLM Error # 122") is a related but distinct error that indicates a different licensing failure. While Error 120 points to an incomplete license file, Error 122 often indicates issues with the Sentinel License Manager service itself. Are you using a license or a network
Disclaimer: The information above is based on standard troubleshooting steps provided by CSI Knowledge Base and community experiences.
If the registry is corrupted, uninstall previous versions (including trials), reboot, and perform a fresh installation. It typically indicates that the software cannot communicate
: You must deactivate the license and then reactivate it to refresh the incomplete file.
A major Windows update or hardware change (like enabling/disabling Wi-Fi) can change your computer’s unique CID, making the license file invalid. You must deactivate the license before making hardware changes. Still Not Working?
By following the step-by-step instructions in this article and implementing the preventive measures, you can eliminate Error 120 from your workflow and return to focusing on what matters most—creating safe, efficient structural designs.
This error completely prevents the software from launching. It indicates that the ETABS application cannot communicate with or validate its license file, whether hosted on a local workstation or a network server.