For Cyclone IV GX devices, the ALTGX megafunction does not support the rx_seriallbken, tx_pipedeemph, tx_pipemargin, and tx_pipeswing ports - For Cyclone IV GX devices, the ALTGX megafunction does not support the rx_seriallbken, tx_pipedeemph, tx_pipemargin, and tx_pipeswing ports Description In the ALTGX MegaWizard Plug-In Manager, the rx_seriallbken , tx_pipedeemph , tx_pipemargin , and tx_pipeswing ports are not supported. If you enable any of these ports, compilation fails with the following message: Error: Port "<port name>" does not exist in macrofunction "basic_alt_c3gxb_component" Resolution Do not enable any of these ports. Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 11.0 ['Cyclone® IV FPGAs'] ['novalue'] ['novalue'] ['novalue']