Recognized Error 18 Extra Quality | Sap2000 License Not

Introduction

License File Cleanup

: If you have multiple license files (e.g., lservrc ), backup and remove older versions to ensure only the most recent, valid license is being read. Licensing errors generated when running CSI software

"License not recognized. Error 18: Extra quality" sap2000 license not recognized error 18 extra quality

Do not simply delete the desktop icon. Use Revo Uninstaller or the Windows uninstaller to remove SAP2000. Then: Introduction License File Cleanup : If you have

• Press Win + R, type services.msc, press Enter.
• Locate Sentinel RMS License Manager.
• Ensure Status is Running and Startup Type is Automatic.
• If not running → Right-click → Start.

Action

: Run the installer and, if prompted or if it hangs, press F4 on your keyboard to trigger the uninstallation of previous native images. Press Win + R , type services

• Ensure the PC has internet access (some license checks require connectivity).
• Temporarily disable firewall/antivirus and test. If resolved, add these programs/executables to allowlist: