If BIGFILE000 is corrupted or missing a few kilobytes of data, the engine won't be able to open it correctly. Steam and other launchers have a built-in way to repair this without a full reinstall. Right-click the game in your Library . Select Properties > Installed Files . Click Verify integrity of game files .
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.
In 90% of cases, in the game's launcher settings fixes this error instantly. If that fails, administrative privileges and file verification are your next best bets. unable to open bigfile bigfile000 exclusive
Since the error mentions "exclusive" access, it’s possible another program is already "hooked" into the file or the display.
If you’ve encountered the error message you’re likely trying to run a game or application—most commonly associated with Square Enix titles like Tomb Raider , Deus Ex , or Hitman —and finding yourself stuck at a crash-to-desktop or a black screen. If BIGFILE000 is corrupted or missing a few
Sometimes security software flags large data archives as suspicious. Add your game folder to the Exclusion List in Windows Defender or your third-party antivirus.
Try launching the game in standard "Fullscreen" or "Windowed" mode. 2. Run as Administrator Select Properties > Installed Files
Disable overlays from Discord, Steam, or NVIDIA GeForce Experience, as these sometimes interfere with how a game takes control of the screen. 5. Update Graphics Drivers
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