请教：*** [ext_flash_programflash] Error 6

hiker

make: Entering directory `/cygdrive/d/altera/U340/software/U321/Debug'
nios2-flash-programmer --input=ext_flash.flash --sof=`D:/altera/quartus41/sopc_builder/bin/find_sopc_component_dir u304`/system/u304.sof --device=1  --base=0x00800000
Jun 19, 2006 10:56:59 AM - (??) nios2-flash-programmer: Launching Quartus Programmer to download:
     D:/altera/U340/u304/system/u304.sof
Jun 19, 2006 10:57:22 AM - (??) nios2-flash-programmer: Error opening target hardware
Jun 19, 2006 10:57:22 AM - (??) nios2-flash-programmer:    Unable to open flash-device after successfully communicating
with target.
It is likely that you are using a flash-programming FPGA design which
was not created for your target board.

  In order to program flash, you must first create a purpose-built
  flash-programming design (i.e. FPGA configuration) and associate it with
  your particular board.  The Nios development kit is delivered with purpose-built
  flash-programming designs pre-built for several development boards.  If you wish
  to program flash on your own board, you must first create a flash-programming
  design.

  The process of creating a flash-programming design for your board is mostly
  automated.  From a bash-shell, execute this script:

        mk_target_board --help

  The help-message includes references to other documentation on programming
  flash and targeting Nios systems to custom board designs.
- exiting.
WARNING: Default charset GBK not supported, using ISO-8859-1 instead
make: *** [ext_flash_programflash] Error 6
make: Leaving directory `/cygdrive/d/altera/U340/software/U321/Debug'