[Moto E Q&A, Help & Troubleshooting] nimishsk:
I have condor 4.4.2 stock firmware... I am able to flash firmware but while relocking bootlader I am getting some error...

<Bootlader> sst lock failure..!

I am using MOTO E with stock firmware but I want to relock my bootloader to claim warranty..! Please help me out.!

The whole Command and their replies:

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot oem lock begin

...

(bootloader) Ready to flash signed images

OKAY [ 0.068s]

finished. total time: 0.070s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe flash partition gpt.bin

target max-sparse-size: 256MB

sending 'partition' (32 KB)...

OKAY [ 0.032s]

writing 'partition'...

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 0.585s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe flash motoboot motoboot.img

target max-sparse-size: 256MB

sending 'motoboot' (1669 KB)...

OKAY [ 0.107s]

writing 'motoboot'...

(bootloader) Motoboot: Preflash validation for tz

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 0.581s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe flash logo logo.bin

target max-sparse-size: 256MB

sending 'logo' (460 KB)...

OKAY [ 0.087s]

writing 'logo'...

OKAY [ 0.146s]

finished. total time: 0.237s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe flash boot boot.img

target max-sparse-size: 256MB

sending 'boot' (10200 KB)...

OKAY [ 0.413s]

writing 'boot'...

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 1.129s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe flash recovery recovery.img

target max-sparse-size: 256MB

sending 'recovery' (10280 KB)...

OKAY [ 0.418s]

writing 'recovery'...

OKAY [ 1.613s]

finished. total time: 2.035s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe flash system system.img_sparsechunk.0

target max-sparse-size: 256MB

sending 'system' (243147 KB)...

OKAY [ 8.385s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 9.062s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe flash system system.img_sparsechunk.1

target max-sparse-size: 256MB

sending 'system' (257549 KB)...

OKAY [ 8.775s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 8.865s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe flash system system.img_sparsechunk.2

target max-sparse-size: 256MB

sending 'system' (204273 KB)...

OKAY [ 6.958s]

writing 'system'...

(bootloader) Invalid signed image

(bootloader) Preflash validation failed

FAILED (remote failure)

finished. total time: 7.019s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe flash modem NON-HLOS.bin

target max-sparse-size: 256MB

sending 'modem' (46132 KB)...

OKAY [ 1.582s]

writing 'modem'...

OKAY [ 3.953s]

finished. total time: 5.540s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe erase modemst1

erasing 'modemst1'...

OKAY [ 0.019s]

finished. total time: 0.021s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe erase modemst2

erasing 'modemst2'...

OKAY [ 0.016s]

finished. total time: 0.018s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe flash fsg fsg.mbn

target max-sparse-size: 256MB

sending 'fsg' (648 KB)...

OKAY [ 0.104s]

writing 'fsg'...

OKAY [ 0.152s]

finished. total time: 0.261s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe erase cache

erasing 'cache'...

OKAY [ 0.109s]

finished. total time: 0.113s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe erase userdata

erasing 'userdata'...

OKAY [ 0.635s]

finished. total time: 0.637s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe oem lock

...

(bootloader) sst lock failure!

OKAY [ 0.041s]

finished. total time: 0.042s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe oem lock

...

OKAY [ 0.021s]

finished. total time: 0.022s

D:\MOTO E\RETAIL-DSDS_CONDOR_KXC20.82-14_cid7_CFC_1FF.xml\RETAIL-DSDS_CONDOR_KXC

20.82-14_cid7_CFC_1FF.xml>mfastboot.exe reboot-bootloader

rebooting into bootloader...

OKAY [ 0.004s]

finished. total time: 0.005s