Even if lmgrd is new, the vendor daemon ( CSiBridgeDaemon.exe or similar) might be stale. ETABS 2021 looks for a specific feature signature.
: The most reliable "brute force" fix involves completely uninstalling the software, running a Microsoft FixIt tool to clean registry entries, and then performing a clean install. etabs license error 18 2021
Corruption in the installation folder or registry can trigger licensing errors. Uninstall all previous versions of ETABS. Even if lmgrd is new, the vendor daemon ( CSiBridgeDaemon
Reinstall ETABS and ensure you check the box for "Use Standard License" instead of "Use Network License". 2. Check the System Date Even if lmgrd is new