Error when read file and reset too many pattern

SPD 8810 UNABLE TO READ FILE AND RESET PATTERN. PLEASE HELP

Action : Read Flash
Boot : SC8810-NAND
Tips:
1.Remove Battery, Insert usb cable, Insert battery
2.power off Phone, Remove & Reinsert Battery , insert USB Cable
(In Case Some Phone Required to hold bootkey)
Waiting for Phone Usb….
Phone found : SPRD U2S Diag (COM9)
Connecting…
Bootstrap: SPRD3
Connected done.
sending 1st boot…
Phone found : SPRD U2S Diag (COM9)
Connecting…
1st Boot is done.
Waiting for Boot init…
Done.
Switching Baudrate to 115200
Sending 2nd Boot…

Action completed
Time taken : 00:00:00
Reconnect Battery/USB Cable
CS-Tool Ver 1.50.2
2nd Boot done.
Waiting for Boot init…
Done.
SC Boot Ver : 8810
SC Boot Mode : 8810004000005A00
Loading CST Boot image to RAM…
The CST Boot runs normally.
CHIP : SC8810
CPU ID : 88100040
NAND ID : 009800BCFFFFFFFF
NAND Size: 512MB
NAND Name: NAND_TYBC0A111236KC10
Boot Information completed.

Dumping Flash Image Now…
Error: 0xe31 [read].

Action completed
Time taken : 00:00:00
Reconnect Battery/USB Cable
CS-Tool Ver 1.50.2