If you are using a network license, the most common culprit is a stopped service on the host machine. Press , type services.msc , and hit Enter. Locate Sentinel RMS License Manager in the list.
The Sentinel RMS License Manager service is not running. unable to find a license etabs 18
Security software is preventing the app from "calling home" to the server. If you are using a network license, the
If it’s missing, you may need to run the utility found in the same folder to re-activate your code. Error #17 or #120)?
Are you seeing a specific (e.g., Error #17 or #120)?