The original BLCMM, while widely used, has not been actively updated in recent years. If you're encountering errors that persist after trying the steps above, it may be time to consider switching to . Launched in 2023, OpenBLCMM is a fully open-source fork of the original BLCMM, developed to fix longstanding issues and provide a more modern, maintained version of the application.
If you made the file yourself, ensure it is saved in 0;e0; UTF-8 encoding via Notepad.
BLCMM requires the game executable to be "hex-edited" to allow mods. If the file is strictly read-only or protected by Windows, the tool fails to recognize or modify it. Step-by-Step Solutions to Fix the Error
: Create a new path on your drive that mimics Steam's setup: C:\Program Files (x86)\Steam\steamapps\common\Borderlands 2\Binaries\Win32\ . blcmm invalid file selected
Users often select the desktop shortcut or the game launcher application ( Launcher.exe ). BLCMM cannot patch these files.
Click to automatically hex-edit the executable without having to manually select files. How to Properly Execute Your Mods In-Game
Launch your game and execute the mod using the in-game developer console ( exec patch.txt ). 3. Upgrade to OpenBLCMM The original BLCMM, while widely used, has not
He found the file buried in a corrupted Hyperion server. It was labeled SUPER_NOVA_FINAL_V3.exe .
: Lack of administrative rights can prevent the tool from accessing or modifying the .exe file.
• Check that the file isn’t empty or corrupted. • Open it in Notepad — if it doesn’t start with mod syntax, it’s not a valid BLCMM mod file. • Still stuck? Try re-downloading the mod or exporting it from the mod builder. If you made the file yourself, ensure it
Open the mod .txt file. It should look like computer code (e.g., set ... , BLC ... ). If you see HTML code, website errors, or garbled text, the file is corrupt. 5. Check for "Read-Only" Protection If the file is locked, BLCMM cannot process it. Right-click the .txt file →right arrow Properties →right arrow Uncheck "Read-only" →right arrow Alternative Solutions: OpenBLCMM
Open BLCMM, go to Tools -> Setup Game Files for Mods , and ensure the path points directly to the Binaries folder containing the Borderlands2.exe . 3. Hex Editing Conflicts
. It is more reliable for current game versions than the built-in BLCMM hex editor. Verify File Integrity
A: For OpenBLCMM, you can access the log directory by clicking the "Open Log Dir" button in the Help → About dialog. The log files are typically stored in %LOCALAPPDATA%\OpenBLCMM on Windows, ~/.local/share/OpenBLCMM on Linux, or ~/Library/Application Support/OpenBLCMM on Mac.
: Using an old version of BLCMM rather than the more current OpenBLCMM can lead to compatibility issues with recent game patches. How to Fix "BLCMM Invalid File Selected" 1. Add "Steam" to the File Path