[Honor 9 Lite  Guides, News, & Discussion] JamesBott:
[MENTION=5962154]VigneshS007[/MENTION]

test system-arm64-ab.img

boot to custom-recovery

wipe cache (formatting cache .. down)

wipe data/factory reset / confirm yes / confirm yes - format 0..100%

vol-up and power and usb-wire in phone and pc : boot to bootloader

fastboot devices (phone is online!)

fastboot flash system system-arm64-ab.img

target reported max download size of 471859200 bytes

sending sparse 'system' (460796 KB)...

FAILED (status read failed (Protocol error))

finished. total time: 1.547s

usb-wire out phone / return in phone

fastboot devices (phone is online!)

fastboot flash system system-arm64-ab.img

target reported max download size of 471859200 bytes

sending sparse 'system' (460796 KB)...

OKAY [ 14.497s]

writing 'system'...

OKAY [ 3.356s]

sending sparse 'system' (421628 KB)...

OKAY [ 13.025s]

writing 'system'...

OKAY [ 2.928s]

sending sparse 'system' (388444 KB)...

OKAY [ 11.666s]

writing 'system'...

OKAY [ 2.704s]

finished. total time: 48.177s

now is in phone custom-recovery, data fresh formated, system-arm64-ab.img

usb-wire is in phone

fastboot reboot

phone boot... / black screen / <- 3x / Huawei eRecovery "Factory data reset(recommended)" yes(do it)

low-level format 0..5% / reset failed! / reboot system now

phone boot 2x and go to Huawei eRecovery (this flash dont work / shutdown)

vol-down press and hold, usb-wire put in phone, phone boot to bootloader

fastboot devices (phone is online!)

fastboot flash system system-arm64-ab.img

target reported max download size of 471859200 bytes

sending sparse 'system' (460796 KB)...

OKAY [ 14.281s]

writing 'system'...

OKAY [ 3.511s]

sending sparse 'system' (421628 KB)...

FAILED (status read failed (Protocol error))

finished. total time: 21.386s

usb-wire out phone

usb-wire in phone

fastboot devices (phone is online!)

fastboot flash system system-arm64-ab.img

target reported max download size of 471859200 bytes

sending sparse 'system' (460796 KB)...

OKAY [ 14.359s]

writing 'system'...

OKAY [ 3.235s]

sending sparse 'system' (421628 KB)...

OKAY [ 12.947s]

writing 'system'...

OKAY [ 2.931s]

sending sparse 'system' (388444 KB)...

OKAY [ 11.664s]

writing 'system'...

OKAY [ 2.710s]

finished. total time: 47.846s

fastboot reboot and fast usb-wire out phone

You device is booting now... /black screen <- 2x /Huawei eRecovery /THIS way not work!!!

vol-down press and hold, usb-wire put in phone, phone boot to bootloader

fastboot devices (phone is online!)

fastboot flash system system.img

target reported max download size of 471859200 bytes

sending sparse 'system' (458906 KB)...

FAILED (status read failed (Protocol error))

finished. total time: 14.487s

usb-wire out phone

vol-up press and hold and power /boot to eRecovery/ factory reset

phone off

vol-down press and hold, usb-wire put in phone, phone boot to bootloader

fastboot devices (phone is online!)

fastboot flash system system.img

phone off

power

phone boot to factoryOS !!! this is the best: my phone work, no bootloop or other error

i think, the problem is "i am" or the instructions or "what else"

i think, if i do factory-reset the phone low-level format "data" and set inside instructions "test by next boot what system.img is installed" or other test

this test i now 5x do and the way is by all the same.

anyone info i missing to get out of this loop

i hope very powerful: anyone developer write twrp and system(LOS or RR) for this phone !

at the moment i could nail it to the wall / i am very frustrated / a little bit :(

excuse me for long writing text, i hope the mistake is easier to find