Description
In the Intel® Quartus® Prime Pro Edition software version 18.1 Update 2 and later, you may see this error when using a floating license. This error occurs because the FlexLM library has been upgraded to v11.16.1.0
Resolution
To fix this error, upgrade the license daemon software on your license server to the newer version.
The new daemon software (alterad) is included in the Intel® Quartus® Prime Pro Edition software version 18.1 Update 2 or it can be downloaded from the website.