: For standalone licenses, try deactivating the license through the Help > License Information menu (if accessible) or the standalone licensing tool, then reactivating it with your original activation key. Official Support Resources
in ETABS 2016 is a licensing-related issue that typically appears immediately upon launching the software. The full error message usually reads: “License not recognized. Error 30. The license file or license server is not responding.” license not recognized error 30 etabs 2016
: If the error persists, it may be due to corrupted registry entries. Perform a clean uninstall of ETABS, reboot, and reinstall the software. : For standalone licenses, try deactivating the license