nios ii flash programming error

The secondtime download ,it works:

# !/bin/sh# # This file was automatically generated by the Nios II IDE Flash Programmer.# # It will be overwritten when the flash programmer options change.#

cd G:/nios_ii_sw/led_blink_8bit/software/led_blink_8bit/Debug# Creating .flash file for the project

"$SOPC_KIT_NIOS2/bin/elf2flash" --base=0x02400000 --end=0x27fffff --reset=0x2400

000 --input="led_blink_8bit.elf" --output="cfi_flash.flash" --boot="D:/altera/90

/ip/altera/nios2_ip/altera_nios2/boot_loader_cfi.srec"# Programming flash with the project

"$SOPC_KIT_NIOS2/bin/nios2-flash-programmer" --base=0x02400000 --cable='USB-Blas

ter [USB-0]' --sidp=0x02801010 --id=2017564571 --timestamp=1277911500 --instance

=0 "cfi_flash.flash"

Using cable "USB-Blaster [USB-0]", device 1, instance 0x00

Resetting and pausing target processor: OK

Reading System ID at address 0x02801010: verified

: Checksumming existing contents

00000000 : Verifying existing contents

Checksummed/read 16kB in 2.1s

Erase not required

00000000 ( 0%): Programming

00004000 ( 0%): Programming

00006000 (12%): Programming

00008000 (25%): Programming

Programmed 62KB in 2.5s (24.8KB/s)

Device contents checksummed OK

Leaving target processor paused