The 14.2 and earlier tools release do not support flash programming on the Avnet ZED board.
The Avnet ZED board has a 256Mbit part on the board. To access the full memory space of this part, new SPI commands are required. The current programming solution does not support these additional commands.
The 14.3 tools do support programming the first 128Mbit of the device, but the second 128Mbit is inaccessible for programming.
Please contact Avnet for recommendations on programming the second 128Mbit on the ZED board QSPI device.