[Xiaomi Mi A1 Guides, News, & Discussion] Dratinire:
Hey!

Thanks for the solution, but its stuck somewhere else now: at the system_a error

D:\Nexus5\tissot\tissot>flash_all

D:\Nexus5\tissot\tissot>fastboot getvar product 2>&1 | findstr /r /c:"^produ
ct: *tissot" ||
product: tissot

D:\Nexus5\tissot\tissot>fastboot oem unlock ||
...
OKAY [ 0.006s]
finished. total time: 0.006s

D:\Nexus5\tissot\tissot>fastboot flash modem_a D:\Nexus5\tissot\tissot\images\m
odem.img ||
target reported max download size of 534773760 bytes
sending 'modem_a' (86016 KB)...
OKAY [ 2.476s]
writing 'modem_a'...
OKAY [ 0.395s]
finished. total time: 2.871s

D:\Nexus5\tissot\tissot>fastboot flash modem_b D:\Nexus5\tissot\tissot\images\m
odem.img ||
target reported max download size of 534773760 bytes
sending 'modem_b' (86016 KB)...
OKAY [ 2.475s]
writing 'modem_b'...
OKAY [ 0.402s]
finished. total time: 2.879s

D:\Nexus5\tissot\tissot>fastboot flash sbl1 D:\Nexus5\tissot\tissot\images\sbl1
.img ||
target reported max download size of 534773760 bytes
sending 'sbl1' (365 KB)...
OKAY [ 0.049s]
writing 'sbl1'...
OKAY [ 0.023s]
finished. total time: 0.072s

D:\Nexus5\tissot\tissot>fastboot flash sbl1bak D:\Nexus5\tissot\tissot\images\s
bl1.img ||
target reported max download size of 534773760 bytes
sending 'sbl1bak' (365 KB)...
OKAY [ 0.049s]
writing 'sbl1bak'...
OKAY [ 0.023s]
finished. total time: 0.073s

D:\Nexus5\tissot\tissot>fastboot flash rpm D:\Nexus5\tissot\tissot\images\rpm.i
mg ||
target reported max download size of 534773760 bytes
sending 'rpm' (170 KB)...
OKAY [ 0.039s]
writing 'rpm'...
OKAY [ 0.022s]
finished. total time: 0.062s

D:\Nexus5\tissot\tissot>fastboot flash rpmbak D:\Nexus5\tissot\tissot\images\rp
m.img ||
target reported max download size of 534773760 bytes
sending 'rpmbak' (170 KB)...
OKAY [ 0.039s]
writing 'rpmbak'...
OKAY [ 0.022s]
finished. total time: 0.062s

D:\Nexus5\tissot\tissot>fastboot flash tz D:\Nexus5\tissot\tissot\images\tz.img
||
target reported max download size of 534773760 bytes
sending 'tz' (1511 KB)...
OKAY [ 0.078s]
writing 'tz'...
OKAY [ 0.027s]
finished. total time: 0.106s

D:\Nexus5\tissot\tissot>fastboot flash tzbak D:\Nexus5\tissot\tissot\images\tz.
img ||
target reported max download size of 534773760 bytes
sending 'tzbak' (1511 KB)...
OKAY [ 0.079s]
writing 'tzbak'...
OKAY [ 0.028s]
finished. total time: 0.107s

D:\Nexus5\tissot\tissot>fastboot flash devcfg D:\Nexus5\tissot\tissot\images\de
vcfg.img ||
target reported max download size of 534773760 bytes
sending 'devcfg' (37 KB)...
OKAY [ 0.039s]
writing 'devcfg'...
OKAY [ 0.021s]
finished. total time: 0.061s

D:\Nexus5\tissot\tissot>fastboot flash devcfgbak D:\Nexus5\tissot\tissot\images
\devcfg.img ||
target reported max download size of 534773760 bytes
sending 'devcfgbak' (37 KB)...
OKAY [ 0.039s]
writing 'devcfgbak'...
OKAY [ 0.022s]
finished. total time: 0.061s

D:\Nexus5\tissot\tissot>fastboot flash dsp D:\Nexus5\tissot\tissot\images\adsps
o.bin ||
target reported max download size of 534773760 bytes
sending 'dsp' (16384 KB)...
OKAY [ 0.486s]
writing 'dsp'...
OKAY [ 0.087s]
finished. total time: 0.574s

D:\Nexus5\tissot\tissot>fastboot flash sec D:\Nexus5\tissot\tissot\images\sec.d
at ||
target reported max download size of 534773760 bytes
sending 'sec' (0 KB)...
OKAY [ 0.040s]
writing 'sec'...
OKAY [ 0.021s]
finished. total time: 0.061s

D:\Nexus5\tissot\tissot>fastboot flash splash D:\Nexus5\tissot\tissot\images\sp
lash.img ||
target reported max download size of 534773760 bytes
sending 'splash' (1103 KB)...
OKAY [ 0.068s]
writing 'splash'...
OKAY [ 0.026s]
finished. total time: 0.094s

D:\Nexus5\tissot\tissot>fastboot flash misc D:\Nexus5\tissot\tissot\images\misc
.img ||
target reported max download size of 534773760 bytes
sending 'misc' (8 KB)...
OKAY [ 0.039s]
writing 'misc'...
OKAY [ 0.020s]
finished. total time: 0.060s

D:\Nexus5\tissot\tissot>fastboot flash aboot D:\Nexus5\tissot\tissot\images\emm
c_appsboot.mbn ||
target reported max download size of 534773760 bytes
sending 'aboot' (579 KB)...
OKAY [ 0.049s]
writing 'aboot'...
OKAY [ 0.023s]
finished. total time: 0.073s

D:\Nexus5\tissot\tissot>fastboot flash abootbak D:\Nexus5\tissot\tissot\images\
emmc_appsboot.mbn ||
target reported max download size of 534773760 bytes
sending 'abootbak' (579 KB)...
OKAY [ 0.049s]
writing 'abootbak'...
OKAY [ 0.023s]
finished. total time: 0.073s

D:\Nexus5\tissot\tissot>fastboot flash boot_a D:\Nexus5\tissot\tissot\images\bo
ot.img ||
target reported max download size of 534773760 bytes
sending 'boot_a' (13939 KB)...
OKAY [ 0.420s]
writing 'boot_a'...
OKAY [ 0.096s]
finished. total time: 0.517s

D:\Nexus5\tissot\tissot>fastboot flash boot_b D:\Nexus5\tissot\tissot\images\bo
ot.img ||
target reported max download size of 534773760 bytes
sending 'boot_b' (13939 KB)...
OKAY [ 0.418s]
writing 'boot_b'...
OKAY [ 0.089s]
finished. total time: 0.508s

D:\Nexus5\tissot\tissot>fastboot flash system_a D:\Nexus5\tissot\tissot\images\
system.img ||
error: cannot load 'D:\Nexus5\tissot\tissot\images\system.img'
"Flash system_a error"

D:\Nexus5\tissot\tissot>

EDIT: To all those who face the above problem try updating adb drivers from 1.3 to 1.4.3. That should fix the problem!