: BLCMM requires a specific Java environment to function correctly. How to Fix the "BLCMM Invalid File Selected" Error 1. Switch to OpenBLCMM
The most effective solution is to stop using the original BLCMM and switch to , an open-source fork designed to fix longstanding issues and support modern game versions.
: BLCMM often checks for a directory named "steam" within the game's file path. If your game is installed on a different drive or through a service like Epic Games, it may trigger an error.
If you must use the original tool, you can often "trick" it by adjusting your folder structure:
: It is actively maintained and handles the file detection bugs present in the original 2018 release. 2. Manually Fix the File Path
: Lack of administrative rights can prevent the tool from accessing or modifying the .exe file.
: Standard BLCMM has not been updated in years and often fails to recognize newer versions of Borderlands 2 (such as the Commander Lilith DLC update).