"Just a routine flash," he’d told himself three hours ago. He was an expert, the guy people called when their bootloaders refused to budge. Yet, there it was, glaring in crimson text across his monitor: "error: cannot find file flash_all_lock.bat." Elias leaned back, the blue light of the Mi Flash Tool
: You likely have the "clean all and lock" option selected at the bottom of the Mi Flash Tool, but the firmware package you downloaded does not include the locking script. Incomplete Extraction : Firmware files for Xiaomi are often compressed in
: Placing the unzipped folder inside directories that have spaces, symbols, or non-English characters in their folder names (e.g., C:\Users\John Doe\Desktop\My Phone\ ). mi flash error cannot find file flashalllockbat
fastboot oem lock
If you are certain you want to use the "clean all and lock" option but the file is missing, some users fix this by creating a dummy file. However, It is much safer to use the "clean all" script. If you must lock your bootloader, ensure you are flashing the exact official global or regional ROM that originally came with your phone. Summary Checklist Select "clean all" instead of "clean all and lock." Move the ROM folder to * C:* to shorten the path. Ensure the folder contains an images sub-folder. "Just a routine flash," he’d told himself three hours ago
If the script is genuinely missing from your ROM, you can try to recreate it. This is a more advanced fix but can be very effective.
: Occasionally, European (EEA) or Global developer ROM variants name this file differently, causing the tool to look for a name that does not exist. Step-by-Step Fixes 1. Confirm You Are Using a Fastboot ROM Incomplete Extraction : Firmware files for Xiaomi are
: If the Fastboot ROM was not fully downloaded or properly extracted, key scripts like flash_all_lock.bat may be missing or incomplete.
Use or WinRAR (not Windows built-in extractor) to extract the .tgz twice:
