Description
Due to a problem in the Quartus® Prime software version 15.1 Update 1 and earlier, you may see this internal error when running the PowerPlay™ Power Analyzer on a Windows operating system.
Resolution
To work around this problem, download and install patch 1.11 from the link below. You must install the Quartus Prime software version 15.1 Update 1 before installing this patch.
This problem is scheduled to be fixed in a future release of the Quartus Prime software.