[Moto X4 Questions & Answers] Der_CraftMeister:
Thanks, I got the info from "getvar":

(bootloader) kernel: uefi
(bootloader) version-bootloader: MBM-3.0-payton_fi-0e6e7ce-181231
(bootloader) product: payton
(bootloader) board: payton
(bootloader) secure: yes
(bootloader) hwrev: P4
(bootloader) radio: NA
(bootloader) storage-type: eMMC
(bootloader) emmc: 64GB SKHYNIX HCG8a4 RV=08 PV=A2 FV=00000000000000A2
(bootloader) ufs: N/A
(bootloader) ram: 4GB SKHYNIX LP4x DIE=16Gb M5=06 M6=04 M7=00 M8=11
(bootloader) cpu: SDM630 1.0 (2)
(bootloader) serialno: <<ELIDED>>
(bootloader) cid: 0x0032
(bootloader) channelid: 0x8d
(bootloader) uid: 9C3D2B91
(bootloader) securestate: oem_locked
(bootloader) verity-state: enforcing (0)
(bootloader) iswarrantyvoid: no
(bootloader) max-download-size: 536870912
(bootloader) reason: Reboot mode set to fastboot
(bootloader) imei: <<ELIDED>>
(bootloader) meid:
(bootloader) date: 08-28-2018
(bootloader) sku: XT1900-1
(bootloader) carrier_sku: XT1900-1
(bootloader) battid: SNN5994A
(bootloader) battery-voltage: 4083
(bootloader) iccid: <<ELIDED>>
(bootloader) cust_md5:
(bootloader) max-sparse-size: 268435456
(bootloader) ro.build.fingerprint[0]: motorola/payton_fi/payton_sprout:9
(bootloader) ro.build.fingerprint[1]: /PPWS29.69-39-6-9/b16e4a:user/rele
(bootloader) ro.build.fingerprint[2]: ase-keys
(bootloader) poweroffalarm: 0
(bootloader) ro.build.version.full[0]: Blur_Version.29.491.46.payton_fi.
(bootloader) ro.build.version.full[1]: google_fi.en.US
(bootloader) ro.build.version.qcom: LA.UM.7.2.r1-04900-sdm660.0
(bootloader) version-baseband: <not found>
(bootloader) kernel.version[0]: Linux version 4.4.153-perf-g946d6d55f443
(bootloader) kernel.version[1]: -02533-g44f8cfac145a (hudsoncm@ilclbld85
(bootloader) kernel.version[2]: ) (gcc version 4.9.x 20150123 (prereleas
(bootloader) kernel.version[3]: e) (GCC) ) #1 SMP PREEMPT Tue May 19 02:
(bootloader) kernel.version[4]: 41:47 CDT 2020
(bootloader) git:abl: MBM-3.0-payton_fi-0e6e7ce-181231
(bootloader) git:xbl: MBM-3.0-payton_fi-6b0c3d7-181231
(bootloader) git:pmic: MBM-3.0-payton_fi-6b0c3d7-181231
(bootloader) git:rpm: MBM-3.0-payton_fi-b0c6622-181231
(bootloader) git:tz: MBM-3.0-payton_fi-c593123-dirty-181231
(bootloader) git:hyp: MBM-3.0-payton_fi-c593123-dirty-181231
(bootloader) git:devcfg: MBM-3.0-payton_fi-c593123-dirty-181231
(bootloader) git:cmnlib: MBM-3.0-payton_fi-c593123-dirty-181231
(bootloader) git:cmnlib64: MBM-3.0-payton_fi-c593123-dirty-181231
(bootloader) git:keymaster: MBM-3.0-payton_fi-c593123-dirty-181231
(bootloader) git:prov: MBM-3.0-payton_fi-c593123-dirty-181231
(bootloader) git:storsec: MBM-3.0-payton_fi-c593123-dirty-181231
(bootloader) frp-state: protected (409)
(bootloader) ro.carrier: retus
(bootloader) current-slot: a
(bootloader) running-bl-slot: _a/_a
(bootloader) running-boot-lun: 0
(bootloader) slot-count: 2
(bootloader) slot-successful:_a: no
(bootloader) slot-successful:_b: no
(bootloader) slot-unbootable:_a: no
(bootloader) slot-unbootable:_b: no
(bootloader) slot-retry-count:_a: 7
(bootloader) slot-retry-count:_b: 0
all: listed above
finished. total time: 0.045s

...upon which I downloaded:

XT1900-1_PAYTON_FI_9.0_PPWS29.69-26-4_subsidy-DEFAULT_regulatory-DEFAULT_CFC.xml.zip

from the mirrors site, and still got (remote failure) upon trying to flash the boot_a partition with boot.img.

Any hints/helps?

Regards,

Chris.