Open , which is the default port used by Sentinel RMS.
Check if your "Locking Code" matches the one tied to your active license. Preventing Future License Errors
Often, the license service simply hangs. Restarting it refreshes the connection. Press Win + R , type , and hit Enter. Locate Sentinel RMS License Manager . etabs license not recognized error 120
Open it with Notepad and ensure it contains only the hostname or IP address of your license server. Save and close. 4. Firewall and Antivirus Exceptions
: Firewalls or antivirus software preventing the "lsans.exe" process from communicating. Open , which is the default port used by Sentinel RMS
If ETABS doesn't know where to look for the license, it will trigger Error 120.
Understanding the root cause and following a systematic troubleshooting guide can get you back to work in minutes. What Causes Error 120 in ETABS? Restarting it refreshes the connection
📍 : Ensure both ETABS and the Sentinel RMS License Manager are the latest versions provided by CSI.📍 Static IP Addresses : If using a network license, assign a static IP to the server to prevent the LSFORCEHOST path from breaking.📍 Stable Internet : For cloud-based licenses, a flickering connection can trigger Error 120 mid-session.
: The standalone or network license has reached its end date. Step-by-Step Solutions to Fix Error 120 1. Restart the Sentinel RMS License Manager
Did this error occur after a or a hardware change?