Why do I see a fitter error(21843) when bypassing RX auto adaptation for FGT channels by qsf assignments? - Why do I see a fitter error(21843) when bypassing RX auto adaptation for FGT channels by qsf assignments? Description You will see fitter errors like the one below when bypassing RX auto adaptation for FGT channels by qsf assignments, as described in chapter 3.12.2. FGT PMA Settings of UG20315. Error(21843): user.bb_f_ux_tx[3] -> IP_INST[0].hw_ip_top|dut|eth_f_0|hip_inst|per_xcvr[3].x_bb_f_ux|x_bb_f_ux_tx Error(21843): flux_mode == FLUX_MODE_CPRI Error(21843): is_used == TRUE Error(21843): location == UX8 That is because the qsf assignments in the latest F-Tile Architecture and PMA and FEC Direct PHY IP User Guide are not enough. Besides the assignments, you should add " set_instance_assignment -name HSSI_PARAMETER "flux_mode=FLUX_MODE_BYPASS" -to <TX_SERIAL_PIN>] -entity " also. Resolution The assignments syntax is scheduled to be fixed in the future release of the UG20315. Custom Fields values: ['novalue'] Troubleshooting 15014762391 False ['F-Tile PMA/FEC Direct PHY IP'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 23.3 ['Agilex™ 7 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']