Why does Active Serial configuration fail on Cyclone® V FPGAs with 3rd party flash such as Macronix MX25L devices? - Why does Active Serial configuration fail on Cyclone® V FPGAs with 3rd party flash such as Macronix MX25L devices? Description Due to a problem in Intel® Quartus® Prime Software version 18.1, you may encounter Active Serial configuration failure on Cyclone® V FPGAs with 3rd party flash such as Macronix MX25L devices, even though flash programming is successful. Resolution The problem has been fixed in Intel® Quartus® Prime Software version 18.1.1 and later. Custom Fields values: ['novalue'] Troubleshooting 1408167913 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 18.1.1 18.1 ['Cyclone® V FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']