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.