This error is essentially BLCMM's way of saying it can't read or process the mod file you're trying to use. This typically happens when the file is incompatible, corrupted, or placed incorrectly. The error can appear in a few different scenarios:
Are you targeting the .exe inside the Binaries\Win32 folder? Have you fully unzipped the mod archive? Does the mod file end strictly in .txt or .blcm ?
A: Game updates often change the executable file, breaking the hex edits that enable mods. In this case, you need to reapply the hex editing process using the Borderlands Hex Multitool or wait for updated versions of the modding tools. If none of the standard fixes work, you may need to wait for a solution from the modding community.
: Lack of administrative rights can prevent the tool from accessing or modifying the .exe file. blcmm invalid file selected
A: The tools discussed in this article are specifically for Borderlands 2, The Pre-Sequel, and Assault on Dragon Keep. Borderlands 3 has its own modding ecosystem and is not compatible with BLCMM or OpenBLCMM. For Borderlands 3, other modding solutions exist.
Please make sure you’re selecting a (mod package) or .txt (mod list) file. Common mod files for Borderlands 2, TPS, or BL3 use specific headers like #Title or #ModInfo .
If the original BLCMM continues to throw errors, many community members now use , a more up-to-date version. This error is essentially BLCMM's way of saying
This comprehensive guide breaks down exactly why this error happens and provides step-by-step solutions to get your game modded and running smoothly. Understanding the "Invalid File Selected" Error
Since BLCMM often fails to hex-edit modern executables (the "Invalid file" trigger), many users use the BL Hex Multitool
The error occurs when BLCMM or the Hex Multitool expects a specific file format or file path but encounters something else. The most common triggers include: Have you fully unzipped the mod archive
If you are using the "Enhanced" or UHD versions, ensure you are selecting the executable within the folder instead of 3. Hex-Edit the Game File
Jax sighed, deleted the executable, and found the actual script hidden in the readme. He saved it, re-imported, and watched as the red box turned into a beautiful, glowing green checkmark.
If you are trying to open a .txt file that was not generated by BLCMM or is outdated, it may not be recognized. Troubleshooting Steps
: You're automating a process with BLCmm and encounter the error.
