Etabs License Not Recognized Error 120 Info
For structural engineers, ETABS (Extended Three-dimensional Analysis of Building Systems) is the gold standard for building analysis and design. However, few things are as frustrating as sitting down to meet a deadline, launching the software, and being greeted by the dreaded "Error 120: The license is not recognized by the license server."
This error effectively locks you out of your work. It indicates a breakdown in communication between your computer (the client) and the machine holding the license (the server—either a physical computer in your office or a cloud-based license manager).
Don't panic. In 90% of cases, Error 120 is not a license revocation but a network or configuration issue. This comprehensive guide will walk you through what Error 120 means, why it happens, and—most importantly—how to fix it permanently.
Before editing files, perform a full reset of the licensing chain.
Why this works: Licensing services can hang. A full restart forces the license manager to re-read the license file and clear temporary connection states.
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.
ETABS Error 120 is a nuisance, but it is rarely fatal to your project. In 90% of cases, the issue is a firewall blocking the handshake or a service that needs a restart. etabs license not recognized error 120
If you have tried all the steps above and are still seeing "License Not Recognized," it is likely a hardware ID mismatch or a license borrowing issue. In that case, contacting CSI Support directly with your User ID and Locking Code is the best path forward.
Did these solutions work for you? Let us know in the comments below!
The high-stakes world of structural engineering doesn't just involve gravity and seismic loads; sometimes, the greatest stress comes from a digital barrier: ETABS License Error #120. This error typically signals that the license file is incomplete or unrecognized by the Sentinel RMS License Manager. The Story of the Unfinished File
Imagine a lead engineer, Sarah, finishing a complex high-rise model late on a Friday. She hits "Run Analysis," but instead of seeing deflection maps, she’s met with a cold dialogue box: License Not Recognized - Error #120.
For Sarah, this isn't just a glitch; it's a "gatekeeper" error. According to the CSI Knowledge Base, Error #120 specifically means the software found a license file, but it lacks the necessary data to authorize the session. How Sarah Solves the Mystery
To get her project back on track, Sarah follows the standard "investigation" steps recommended by Computers and Structures, Inc. (CSI):
Step 1: The Deactivation LoopSince she is using a Standalone License, the official fix is to deactivate the current license and then reactivate it. This refreshes the lservrc file, ensuring all components are complete. Why this works: Licensing services can hang
Step 2: Checking the "Heartbeat" (Sentinel RMS)If deactivation doesn't work, she checks the Sentinel RMS License Manager service in Windows. If this background service is paused or not running, the software can't "read" even a perfect license file.
Step 3: The Date Format QuirkSometimes, the error is caused by a simple regional setting. If her computer's date/number format isn't set to US (mm/dd/yyyy), the Standalonekey.exe tool may fail to generate the license correctly.
Step 4: The Sentinel CleanupAs a last resort, if the system is clogged with old license remnants, she might use the lsclean.exe utility with the -fixsercom command to "scrub" the license server settings clean. Summary of Solutions Primary Solution Incomplete License File Deactivate and then Reactivate the license. Service Not Running Restart Sentinel RMS License Manager in services.msc. Regional Setting Conflict Change PC date format to US (mm/dd/yyyy). Corrupted Utilities Run the lsclean -fixsercom utility as an Administrator.
By the time the sun set, Sarah had reactivated her key, refreshed her Sentinel services, and successfully initiated her analysis, leaving Error #120 as a solved mystery in her project logs.
Are you dealing with a standalone or a network license, and have you already tried the deactivation/reactivation process? Licensing errors generated when running CSI software
The coffee was still steaming when Leo tried to open ETABS for the Monday morning deadline. Instead of the familiar workspace, a cold, gray box appeared: "License Not Recognized. Error #120." The program terminated before it even began. Leo knew this usually signaled an incomplete license file
. He had spent all Sunday night finishing the 50-story model, and now the software refused to believe he was an authorized user. CSI Knowledge Base Troubleshooting the Lockdown If that works permanently, go to Properties >
To break through Error 120, Leo recalled the standard fixes recommended by Computers and Structures, Inc. (CSI) Reactivate the License : For standalone licenses, the most common fix is to deactivate and then immediately reactivate
the license. This forces the software to rebuild the missing or corrupted license file components. Check the Date/Number Format
: Sometimes, the PC's regional settings clash with the license server. Setting the date/number format to US (mm/dd/yyyy) can resolve recognition issues when running tools like Standalonekey.exe Native Image Cleanup
: 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
file containing the server's IP address to the program folder helps the software find the license faster across the network. CSI Knowledge Base Leo reached for the CSI Licensing troubleshooting tools
in his installation folder. After a quick deactivation and a fresh activation key entry, the error vanished. The 50-story model finally loaded, just as his boss walked in with a second cup of coffee. WechoID.exe lsdecode.exe ) Leo should use to verify his computer's ID?