Why do I get the following error message when generating the 10-Gbps Ethernet MAC, "Error: Error: Family name "Cyclone IV GX" is illegal" - Why do I get the following error message when generating the 10-Gbps Ethernet MAC, "Error: Error: Family name "Cyclone IV GX" is illegal" Description This error occurs when you generate the 10GbE MAC Intel® FPGA IP and if you have installed the Quartus® II software with only a limited set of devices. For example, only Stratix® IV GX device support has been installed. Resolution To work around this error, you can simply re-install the Quartus II software ensuring that all device famlies are installed. Then, regenerate the 10GbE MAC Intel® FPGA IP. This problem is fixed in the Quartus II software v16.1. Related Articles Are there any known issues when installing the Quartus II software without all the device families? Custom Fields values: ['novalue'] Troubleshooting 2205854756 False ['novalue'] ['FPGA Dev Tools Quartus II Software'] 16.1 15.0 ['Arria® GX FPGA', 'Arria® II GX FPGA', 'Arria® II GZ FPGA', 'Cyclone® IV GX FPGA', 'HardCopy™ IV GX ASIC Devices', 'Stratix® II GX FPGA', 'Stratix® IV GT FPGA', 'Stratix® IV GX FPGA', 'Stratix® V GS FPGA', 'Stratix® V GT FPGA', 'Stratix® V GX FPGA'] ['novalue'] ['novalue'] ['novalue']