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:
Fastboot ROMs usually come in .tgz format. Windows does not natively handle .tgz well without third-party tools like 7-Zip or WinRAR.
If Mi Flash Tool still fails, flash manually via command line: mi flash error cannot find file flashalllockbat
This bypasses Mi Flash Tool entirely.