Windows User Account Control (UAC) sometimes blocks third-party apps from reading files out of the Program Files (x86) directory. Right-click your BLCMM launcher file. Select . Try targeting your file again. Update Java Runtime Environment (JRE)
If the original BLCMM continues to throw errors, many community members now use , a more up-to-date version.
: BLCMM's built-in hex-editing feature is known to break after certain game updates.
If you want, tell me where this error appears (website or app) and what file type/size you're uploading and I’ll give specific steps. blcmm invalid file selected
Since BLCMM's built-in hex editor is often the component that fails, use the standalone Borderlands Hex Multitool to prepare your game for mods. OpenBLCMM - Borderlands Community Mod Manager - GitHub
Follow these sequential methods to solve the file-selection lock and return to managing your mods. Method 1: Target the Precise Win32 / Binaries Folder
If the error is specific to one mod file: Try targeting your file again
The text file is not saved in UTF-8 format, which BLCMM requires.
Copy this exact folder path and paste it into BLCMM when prompted to find your game.
To resolve the error in BLCMM (Borderlands Community Mod Manager) If you want, tell me where this error
The file is not a valid text-based patch file (e.g., trying to open a .json or .docx file).
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