blu advance 4.0 a270a flash error ??


look at log

Flash files count is :11
Action : Firmware update.
Selected Model: 0-By CPU: MT6572_EMMC
Exe version: NCKBox AndroidMTK 1.8.7.1
Scenario: [0]Safe Flash
Reinsert phone battery.
Battery must be charged.
Phone must be off with battery inside.
Please insert USB cable now…
Detected : MediaTek USB Port (COM10)
Phone detected…Please wait
Sending DA agent, please wait…
BaseBand CPU :MT6572_S00
BaseBand CPU Secure Version : 05
BaseBand CPU Bootloader Version : 00
—————————————————-
INT RAM: 128 KB SDRAM
EXT RAM: 512 MB DRAM
—————————————————-
EMMC: (28Gb+4096Mb) HYNIX 0x483447316404
EMMC FW VERSION: 86:00:00:00:00:00:00:00
EMMC CID: 90014A48344731 : 000000000000000000
EMMC UA SIZE: 0xe7000000
BOOT STYLE: EMMC BOOT
FULL LENGTH: 0xe7600000 [3.615 GB]
Status: USB_FULL_SPEED
Detecting high speed port, wait……
If driver not installed, install high speed port driver.
If not need high speed port, disable it.
After repeat opperation.
Detecting high speed port, wait……
Detected : MediaTek DA USB VCOM (Android) (COM15)
Warning, flashing preloader disabled!
If you change android version, preloader must be flashed.
Flash EMMC Algo Start.
Error get preloader size, aborting saving.
Starting flash.
Error: ??
All done.