If the error persists, you can also experiment by checking and selecting an older operating system like Windows 7 or Windows XP .
Many users resolve this by using a third-party utility called . This is particularly common for older versions like ETABS 2016 whose licenses might have a hard-coded expiration. Download and install RunAsDate . license not recognized error 30 etabs 2016
Step 3: Reinstall the Sentinel System Driver (For Standalone Licenses) If the error persists, you can also experiment