If your system permissions changed, the game might be unable to "open" the file because it doesn't have permission to write to it. Go to the game’s data folder. Right-click the folder and select . Uncheck Read-only at the bottom.

The error is almost always a symptom of file corruption, improper segmentation, or a lingering file lock. By systematically diagnosing file size, segment completeness, and the "updated" flag, most users can recover their data without third-party tools.

Before closing this article, complete these four checks:

# Check disk space df -h

The "bigfile000" is exactly what it sounds like—a massive archive. If your drive is at 99% capacity, the game may fail to "unpack" or open the file during the post-update initialization. Ensure you have at least 10-15GB of free space on the drive where the game is installed to allow for temporary cache files. 5. Antivirus Interference

While less common for this specific file error, outdated drivers can prevent the engine from initializing the data stream. Use the NVIDIA GeForce Experience AMD Adrenaline software to ensure you are on the latest version. Rise of the Tomb Raider