Xiaomi introduced ARB to prevent downgrading to older, vulnerable Android versions. If you lock the bootloader with an older ROM, ARB can hard-brick your device. To prevent user errors, Xiaomi stopped bundling flash_all_lock.bat in many new ROMs.
Sometimes the extraction process fails, or the download is corrupted, leading to missing scripts like flash_all_lock.bat . Use or WinRAR to extract the .tgz file. mi flash error cannot find file flashalllockbat
typically occurs because the tool is looking for a script that isn't in the folder you selected Xiaomi introduced ARB to prevent downgrading to older,
If you absolutely need to lock the bootloader and the file is missing: Sometimes the extraction process fails, or the download
your extracted Fastboot ROM folder using file explorer.
files. If selecting the root folder fails, try selecting the subfolder directly. Move the ROM Folder to the Root Directory (C:)