You may see the following synthesis message when implementing the Arria® V Hard IP for PCI® Express in Quartus® II software versions 13.1 and earlier.
Info (10648): Verilog HDL Display System Task info at av_hssi_8g_rx_pcs_rbc.sv(1059): Critical Warning: parameter 'invalid_code_flag_only' of instance '...|av_hssi_8g_rx_pcs_rbc' has illegal value '<auto_single>' assigned to it. Valid parameter values are: '(dis_invalid_code_only,en_invalid_code_only)'. Using value 'dis_invalid_code_only'
This warning can be safely ignored.
This problem is fixed starting with the Intel® Quartus® Prime Standard Edition Software version 14.0.