Why are ECO changes to the D3 Delay Chain 1 not implemented correctly? - Why are ECO changes to the D3 Delay Chain 1 not implemented correctly? Description Due to a problem in the Quartus® II software version 14.0 and earlier, you may find that ECO changes to the D3 Delay Chain 1 are not implemented correctly. The change does not take effect, and no difference is seen in the timing netlist or in hardware. This problem affects Arria® V and Cyclone® V devices. Resolution To work around this problem, do not use the ECO flow to modify the D3 Delay Chain 1 setting. You can set the D3 Delay chain 1 value by using the D3_DELAY assignment and recompiling the design. This problem is scheduled to be fixed in a future release of the Quartus® II software. Custom Fields values: ['novalue'] Troubleshooting 2205836015 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Standard'] novalue 13.0 ['Arria® V FPGAs and SoCs', 'Cyclone® V FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']