Etabs License Not Recognized Error 120

If you are using a standalone (local) USB dongle or software license on a single machine, Windows permissions are often the culprit.

If that works permanently, go to Properties > Compatibility > Check "Run this program as an administrator" for the ETABS shortcut.

This report documents the occurrence, troubleshooting steps, and resolution recommendations for ETABS Error 120: "License Not Recognized." The error indicates that the ETABS application cannot locate or validate a valid license on the target machine or network, preventing the software from launching. etabs license not recognized error 120

  • Verify server process and ports:
  • Test connectivity:
  • Confirm license file / server name:
  • DNS and hostname:
  • Check multiple network interfaces:
  • Review logs:
  • License borrowing (if used):
  • Reinstall / repair license manager:
  • Verify OS-level limits:

    • Error 120 is a status code generated by Sentinel RMS (Rights Management System) , the licensing technology that ETABS (and other CSI products like SAP2000, SAFE, and CSiBridge) uses.

    The code breaks down as follows:

    Crucial distinction: Error 120 is different from Error 94 (No license available) or Error 492 (Cannot connect to server). Error 120 means the server heard you, but it doesn't recognize your request as valid.

    This is the fix for 70% of Error 120 cases. You must ensure that your license supports your ETABS version. If you are using a standalone (local) USB

    How to check:

    Solution: Uninstall the newer ETABS and install the version your license supports, OR contact your distributor to upgrade your license. If that works permanently, go to Properties >