Error (17950): Pin corresponding to CLKUSR has not been reserved in the device. Cannot perform unused RX clock workaround. - Error (17950): Pin corresponding to CLKUSR has not been reserved in the device. Cannot perform unused RX clock workaround. Description In the Quartus® Prime Standard Edition Software, you may see this error when no transceiver is used in the design but the following entry is in the Quartus Setting File (.qsf): set_global_assignment -name AUTO_RESERVE_CLKUSR_FOR_CALIBRATION OFF This assignment prevents the CLKUSR from being automatically reserved. Resolution To avoid this error, remove this assignment from the .qsf Custom Fields values: ['novalue'] Troubleshooting FB: 557598; False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] No plan to fix No plan to fix ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']