: 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.
Proactive measures can minimize future licensing issues.
If the above steps do not work, you may need to look into deeper technical issues.
ETABS, developed by Computers and Structures, Inc. (CSI), is a powerhouse for structural analysis and design. However, even the most seasoned engineers can encounter frustrating licensing issues. A common issue among users, particularly those with standalone licenses, is the dreaded . etabs license not recognized error 120
If the license file is corrupted, you can manually replace it.
Set the to the exact IP address or hostname of your license server. Click OK on all windows, restart your PC, and launch ETABS. 3. Verify the Sentinel RMS License Manager Service
: If the error appeared after a fresh update, Leo might need to uninstall the CSI native image using the installer to clear out conflicting old data. Network Pathing : For office setups, adding an LMHOST.INI : Sometimes registry errors during installation cause this
The license on the server has expired or has been corrupted. Troubleshooting Steps for ETABS Error 120
| Step | Action Taken | Result | |------|--------------|--------| | 1 | Restarted ETABS and computer | Error persisted | | 2 | Verified that CSI License Manager service is running ( services.msc ) | Service was [running / stopped / missing] | | 3 | Checked firewall rules for ETABS and lmgrd.exe | [Blocked / Allowed] | | 4 | Temporarily disabled antivirus software | Error [resolved / persisted] | | 5 | Verified license file ( lservrc ) exists in C:\ProgramData\CSI\Licenses\ | File [present / missing] | | 6 | Checked USB hardware key (if applicable) | Key [detected / not detected] | | 7 | Ran ETABS as Administrator | Error [resolved / persisted] | | 8 | For network license: Pinged license server IP | [Successful / Failed] |
If your organization uses a concurrent network license server, Error 120 indicates your local workstation cannot properly fetch a seat from the server. 1. Configure the Environment Variable Perform a fresh installation
Error 120 is fundamentally a validation failure. When you launch ETABS, it calls upon the Sentinel RMS License Manager to read a coded string inside your license file. If this string is missing, expired, altered, or blocked by system permissions, ETABS throws Error 120. Primary Causes
Sometimes, ETABS fails to write the license file to the installation folder due to restricted user permissions. Close ETABS completely. Right-click the ETABS shortcut on your desktop. Select . Attempt the activation process again. 3. Check System Date and Time
Map your terminal’s specific machine host name or IP to ensure the server automatically flags a priority token for your workstation, bypassing general pool checks. 🔍 System-Level Diagnostics & Registry Cleaning