Fastboot Erro "Fastboot Reason: Falied to inicialize partition table"

SPEAKING FOLKS Firmness ? STAND WITH A MOTO G 1 GENERATION , I WENT TO UNLOCK The BOOTLOADER AND NOW IT ONLY ON THE Fastboot SCREEN WITH THIS NEXT ERROR ,

" Fastboot Reason: falied to boot partition table " Already Tried Installing A ROM BY Fastboot NOT THE RIGHT OF THIS NEXT ERROR IN ALL

THE COMMAND LINES "failed (remote) " . THE FIRST COMMAND " flash partition mfastboot.exe gpt.bin " IT 'S THE FOLLOWING ERROR ,

''target max-sparse-size: 256MB

sending 'partition' (32 KB)...

OKAY [ 0.024s]

writing 'partition'...

(bootloader) This may take a few seconds, if a

(bootloader) different partition table is being

(bootloader) flashed since we need to backup

(bootloader) and restore a few partitions

(bootloader) Flashing primary GPT image...

(bootloader) Failed to write primary GPT.

(bootloader) Failed to program partition table

FAILED (remote failure)

finished. total time: 5.277s'''

'''

AND IN OTHER LINES OF COMMAND "FAILED (remote failure ) ," JA USED RSD Lite , have USED THE COMMAND " mfastboot oem fb_mode_clear "

BUT WHEN WILL UNLOCK The Bootload THE NEW ERROR SOMEONE I COULD HELP ME ?

I tried to downgrade to 4.4.4 kit kat most still can not install nor a firmeware on bike g and also tried to install the 5.1 version of the same thing.

desulpe the English but I'm from Brazil I'm still learning.