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

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

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

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