If you are sending this to CSI Support, they will almost always ask for your (Machine ID). You can find this by running the Sentinel Advanced Key Programmer tool usually found in the Sentinel RMS installation folder, or by checking the "About" section in older SAP2000 versions if you can access the menu.
: If you are using Windows 11 and installed the software on a secondary drive, uninstall it and perform a clean installation on the C: drive . Sap2000 License Not Recognized Error 18
This article is based on current support documentation from CSI and community troubleshooting guidelines. Always refer to official CSI manuals for your specific version. If you are sending this to CSI Support,