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
Try creating an LMHOST.INI file in the installation folder containing only the IP address of your license server to help the software find the host faster. Corrupted License Deactivate and Reactivate using StandaloneKey.exe . Regional Mismatch Set Windows region format to English (United States) . Missing Connection Create an LMHOST.INI file with the server IP. Admin Rights Right-click ETABS and select Run as Administrator . If you'd like to troubleshoot a specific setup, tell me: Your ETABS version (e.g., v19, v21) Your license type (standalone or network) Any recent changes made to the PC (like Windows updates) etabs license not recognized error 120
Start with Step 1 (restart services), then move immediately to Step 2 (version check). In most cases, you'll be back to analyzing shear walls and moment frames before your coffee gets cold. Remember: Structural engineering is hard enough—your software licensing shouldn't be. The coffee was still steaming when Leo tried
If you are using a physical red or purple USB key, the issue might be physical. Leo knew this usually signaled an incomplete license
Your security software might be flagging the license check as suspicious activity.
This is the most overlooked cause of Error 120. CSI licenses are often .