Why o_rx_pcs_fully_aligned does not assert for 40GE-4 Advanced mode F-Tile Ethernet Hard IP design when Custom Ethernet line rate > 63Gbps? - Why o_rx_pcs_fully_aligned does not assert for 40GE-4 Advanced mode F-Tile Ethernet Hard IP design when Custom Ethernet line rate > 63Gbps? Description Due to a problem in the Quartus® Prime Pro Edition Software version 25.3 and earlier, you might observe o_rx_pcs_fully_aligned does not assert for the F-Tile Ethernet Hard IP design with below configurations: Advanced mode : Enabled Ethernet mode : 40GE-4 Custom Ethernet line rate : > 63 Gbps Resolution There is no workaround. There is no fix planned in the future. When advanced mode enabled for 40GE-4 design, supported custom Ethernet line rate is: 41.25~63 Gbps. Custom Fields values: ['novalue'] Errata 16025436884 novalue ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 25.3 ['Agilex™ 9 FPGAs and SoCs', 'Agilex™ 7 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']