Error (210027): Can't use configuration device EPCQL256 with selected programming mode - Error (210027): Can't use configuration device EPCQL256 with selected programming mode Description You may see this error message when compiling an Arria® 10 design in Intel® Quartus® Prime or Prime Pro Edition Software version 17.0 or later when you are not using Active Serial (AS) configuration mode. The error is caused by the .qsf assignment below, which appears in the .qsf file by default. set_global_assignment -name USE_CONFIGURATION_DEVICE ON Resolution To work around this error, change the above .qsf assignment to set_global_assignment -name USE_CONFIGURATION_DEVICE OFF The USE_CONFIGURATION_DEVICE assignment is for AS configuration only. Custom Fields values: ['novalue'] Troubleshooting FB: 488806; False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] novalue 17.0 ['Arria® 10 FPGAs and SoCs'] ['novalue'] ['Configuration Devices'] ['novalue']