ya vi cual es tu error me decepciona de un avansado mira para hacer la convercion del k310@w200 como el k310 es cid 49 no le puedes meter un cid 50 hay que respetar el rango de cid amigo ademas dejalo en cid 49 tienes mas posibilidad de parcharlo

Welcome to SEtool2 ( LITE edition ) v 1.11
supported DB2010/DB2012 CID49/50/51/52, DB2020 CID49/51/52
Loaded 51 flash descriptors

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FILE RECOGNIZED AS CUSTOMIZATION PACKAGE.

CDA:CDA102737/16
MODEL:Melinda Generic
VARIANT:AMERICA_2
LANGUAGE: EN
LANGUAGE: PB
LANGUAGE: XL

ChipID:8040,EMP protocol:0301
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:49
Speed:921600
OTP LOCKED:1 CID:49 PAF:1 IMEI:35331601157808 CERT:RED
PATCH:061204 1529 HAN_DB2010_MEM_PATCHER_R2A007_CXC9876543210 0
LDR:060718 0842 LIE_DB2010_FLASHLOADER_R2A003_CXC1326738
Flash ID check:2019
Flash props sent ok

DETACH CABLE FROM PHONE.
REMOVE BATTERY FROM PHONE, THEN INSERT IT BACK
THEN PRESS "READY"

Trying to launch embedded bootloader...
INT LDR:COMPACT_ID_LOADER_CRIPPLED_SETOOL2_R2
Flash ID check:2019
Flash props sent ok
FOUND: R4HA014_CXC1250719_GENERIC_ME
Restore from:R4HA014_CXC1250719_GENERIC_ME
writing E:\w200\Firmwares\W200_R4HA014_MAIN_GENERIC_ME_RED 50.mbn
CURRENT FLASH FILE CID:50
SSW uses complete hash, hash len is:6340
Will flash 317 blocks...
verify block error
last blk:44500000,00010000
Elapsed:282 secs.