If you are running a local network license server and clients get Error 120, the host service might be frozen.
Licensing servers are highly sensitive to "time tampering." If your computer's system date is incorrect, the license file may be flagged as invalid.
Firewalls are preventing communication with the license server.
Check the column. If it is not running, right-click it and select Start . etabs license not recognized error 120
If the above steps do not work, you may need to look into deeper technical issues.
The lservrc file contains your text-based license string. If this file becomes corrupted or is placed in the wrong directory, ETABS will throw Error 120.
Mismatched lock criteria trigger Error 120 immediately because the validation engine thinks the software was copied to unapproved hardware. If you are running a local network license
: Sometimes registry errors during installation cause this mismatch. You can try running a Microsoft FixIt tool or a clean reinstall: Uninstall all previous versions (including trials). Reboot your machine. Perform a fresh installation.
Sentinel RMS licensing is highly sensitive to time tampering. If your machine's clock drifts even by a few minutes, the license token becomes invalid.
is set to the correct IP address or hostname of your license server. Network & Firewall Check: Confirm that UDP Port 5093 Check the column
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The primary causes include: