Due to a problem in the Intel® Quartus® Prime Software version 16.1.2 and following, you may see the above error when generating the Low Latency 40G Ethernet KR4 IP core for Arria® 10.
Device Family: Intel® Arria® 10
Type: Answers, Errata
Area: Intellectual Property
Last Modified: May 04, 2017
Version Found: v16.1 Update 2
Version Fixed: v17.0
Bug ID: FB: 434582;
IP: Low Latency 40G 100G Ethernet
You may safely ignore this error, the IP will still generate and function properly.
This problem is fixed starting in version 17.0 of the Quartus Prime Software.