Description
Due to a problem in the Quartus® II software version 14.1, you may see this Internal Error in the Assembler when compiling a HSSI design targeting an Arria® V SoC B5 device.
Resolution
To work around this problem, download and install patch 0.25 from the links below. You must install the Quartus II software version 14.1 before installing this patch.
This problem is scheduled to be fixed in a future release of the Quartus II software.