✅ Sometimes security software blocks the localhost communication (port 27000).
✅ 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. unable to find a license etabs 18
This error typically points to a communication breakdown between the software and the license manager (CSI License Manager or the local license file). Before you reinstall anything, try these quick fixes: try these quick fixes: