Etabs License Not Recognized Error 120 Work May 2026

  • Double-click the service. Set Startup type to Automatic (Delayed Start is also fine).
  • Click Apply → OK.
  • Reboot your computer and test ETABS.

    • Tip: If the service fails to start, note the error code. You may need to reinstall the license manager (Fix 5).

    Error message example:
    “License not recognized. Error code 120” etabs license not recognized error 120 work

    The most common culprit in modern computing environments is the Windows Firewall or third-party antivirus software. The CSI License Manager communicates via specific TCP/IP ports. By default, this is often Port 5053 (though it can vary based on the CSI_license.dat file). Double-click the service

    If Windows Defender Firewall or an enterprise antivirus suite updates its definitions, it may suddenly decide that the traffic coming from lmgrd.exe (the license manager daemon) or ETABS.exe is suspicious, silently dropping the connection. This results in the "Not Recognized" error. Tip : If the service fails to start, note the error code

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