✅ Sometimes security software blocks the localhost communication (port 27000).

🔁 Reinstall the CSI License Manager (not the whole ETABS).

#ETABS #StructuralEngineering #CSIsoftware #LicenseError #EngineeringTools 🚨 ETABS 18 error: “Unable to find a license”

✅ Make sure the license file is in the correct folder ( C:\ProgramData\Computers and Structures\CSI License Manager\Licenses\ ) and hasn’t been deleted by antivirus software.

Quick fixes: 🔹 Run as Administrator 🔹 Restart “CSI License Manager” service 🔹 Check your .lic file path 🔹 Disable antivirus temporarily

Are you suddenly seeing the message when launching ETABS 18? You’re not alone.