Mi Flash Error Cannot Find File Flashalllockbat -

If flash_all_lock.bat is missing but flash_all.bat exists:

Sometimes, special characters or spaces in the folder path can confuse the command prompt execution within Mi Flash.

The Fix:

Recent Xiaomi fastboot ROMs (MIUI 12.5+ and HyperOS) have started omitting flash_all_lock.bat on purpose. Why?

When trying to flash stock firmware (Fastboot ROM) on a Xiaomi device using Mi Flash Tool, you might encounter a frustrating error: mi flash error cannot find file flashalllockbat

cannot find file flashall_lock.bat

This error stops the flashing process immediately. Below is a complete guide to understanding why this happens and how to fix it.

Mi Flash Tool looks for a specific script file inside the ROM folder you selected.
Different ROM types use different scripts:

| Script | Purpose | |--------|---------| | flash_all.bat | Flash without locking bootloader | | flash_all_lock.bat | Flash and lock bootloader | | flash_all_except_storage.bat | Flash everything except user data | | flash_all_lock_crc.bat | Lock + CRC check |

The error means:

You selected a ROM package that expects a “lock” script, but that file is missing.

This usually happens when:

Provide device model, exact ROM filename, folder listing (names of files in the extracted ROM), Mi Flash version, and any fastboot output errors if you need targeted assistance.

If you want, paste the extracted ROM folder listing (filenames) and your device model and I’ll point out the exact next steps. If flash_all_lock

Go back to the source where you downloaded the ROM.

| ROM Type | File Extension | Contains flash_all_lock.bat? | |----------|---------------|-------------------------------| | Fastboot ROM | .tgz | ✅ Yes | | Recovery ROM | .zip | ❌ No |

How to check:
Extract the downloaded file. If you see a folder named images containing files like boot.img, system.img, and a flash_all.bat – you have the correct one.
If you see META-INF folder → You have a Recovery ROM (Wrong).

Solution: Download the Fastboot ROM from Xiaomi Firmware Updater or your official MIUI source. Recent Xiaomi fastboot ROMs (MIUI 12

The error is rarely caused by the tool itself but by the structure of the downloaded firmware file. The primary causes are: