This error essentially means the game engine is trying to access its primary data archive ( BIGFILE000 ) with "exclusive" read/write permissions but is being blocked by another process or a system restriction.
Since the error mentions "exclusive" access, it’s possible another program is already "hooked" into the file or the display. unable to open bigfile bigfile000 exclusive
Check the or AMD Software app for the latest updates. A "Clean Install" of drivers often resolves deeper handshake issues between the OS and the game. This error essentially means the game engine is
Sometimes the system prevents the game from gaining "exclusive" access to its own files because of Windows User Account Control (UAC) restrictions. Navigate to the folder where the game is installed. Right-click the game’s .exe file (e.g., TombRaider.exe ). Select Properties > Compatibility tab. Check the box Run this program as an administrator . Click Apply and restart the game. 3. Verify Game File Integrity A "Clean Install" of drivers often resolves deeper
Open the game’s or Options menu (the small window that pops up before the game actually starts). Look for the Display or Graphics tab. Uncheck the box labeled Exclusive Fullscreen .
Wait for the process to finish; it will automatically redownload any corrupted parts of the bigfile. 4. Check for Background Interference
Troubleshooting the "Unable to Open Bigfile BIGFILE000 Exclusive" Error