Call of Duty: Warzone is one of the most popular games across the globe Activision has recently rolled out its latest update on June 3, which brings a lot of major improvements, hotfixes, and improvements to stability. After the update, players reported they had encountered a critical error while joining the match. This was so frustrating since you stuck and couldn’t join the match due to a fatal error.
Players were not able to join the match and stuck in the lobby; some players also reported they had faced the “Unknown Function” error code fatal. COD: Warzone is available for multiple players and allows cross-platform play on Xbox, PlayStation, and PC. If you are also among those players, then today we are going to share how you can fix Warzone’s “Unknown Function” Fatal Error. Follow the guide mentioned below.
About the Call of Duty: Warzone: Fatal Error “Unknown Function” Bug
This is not a common problem. Instead, it occurred after the recent update on June 3. After the previous update, the Warzone was frozen, and players were not restricted from joining the match.
The fatal error occurring in the COD warzone is experienced on various platforms, such as desktop, Xbox, and other consoles. But, after the recent update, users are facing this unknown function bug. For which we would tell you a method through which you can fix it. So, without further ado, let’s check this out.
Fix Warzone “Unknown Function” Fatal Error: A Guide
There are several ways to fix this error; let’s check some potential methods to resolve the Warzone “Unknown Function” Fatal Error.
Downgrade your NVIDIA Graphics Driver
It might be possible that the recent update to your driver might be creating conflicts. It is not always the case; when an upgraded driver shows such an error, instead, it helps to improve system performance, optimisation, and stability. So, try rolling back the graphics driver. Here are the described instructions.
Downgrade the GPU driver on Windows 10.
- Open Device Manager in the Search box.
- Then, click on Display Adapter to expand the option.
- Double-click on your graphics driver and then click on Roll Back Driver.
- That’s it. Wait for the finish, and then check whether the problem is resolved or not.
How to Roll Back Manually
You need to uninstall the current version of the graphics driver from the app Uninstall. Afterwards, download and install the latest version of your system-supported graphics driver.
- Open Official GeForce Drivers | NVIDIA
- Then search for your graphics driver, and then choose the previous version.
- Click on Download, and then confirm your action.
- Save the file, and then install the graphics driver on your system.
- That’s it.
Use additional commands in COD.
- Open Battle.net and head over to Call of Duty: Warzone.
- Click on the Game Settings option.
- Check the checkbox for “Additional Command Line Arguments.”
- Enter -D3D11, and then hit enter.
- Select Done and re-launch Warzone.
Delete the Player Data File
- Open this PC. Use the Windows + E shortcut key.
- Got to Documents and Opened Call of Duty: Modern Warfare
- Permanently remove the player folder and then re-launch Warzone.
Scanning and repair
Note: In case this doesn’t work, then simply here is the guide.
- Launch Battle.net and head over to COD: Modern Warfare.
- Choose an option and click on Scan and Repair.
- Next, it will automatically download and replace the necessary missing file or corrupted file.
- That’s it!
Delete the profile game file.
- Launch Battle.net and then head over to Call of Duty: Warzone.
- Then, select the option and click Show in Explorer.
- There is a folder called “Call of Duty: Modern Warfare.”
- Delete all the files except “Data.”
- Revert to battle.net and click on the option.
- Choose “scan and repair,” and it will analyse, automatically download, and replace the corrupted files so far.
- That’s it
Disable automatic paging
- Open the Control Panel and then head over to the System.
- Then, from the left panel, click on About.
- In the related settings, you can find Advanced System Settings.
- Alternative: You can open Advanced System Settings from Windows Search.
- Then, click on Settings under Performance
- Next, uncheck “Automatically Manage Paging File Size for All Drivers.”
- Choose “No Paging” and then select Set.
- Click Yes, and then OK to confirm your action.
- Launch Warzone and check.
In case the above-mentioned guide reverts back to the same action. Therefore, if it doesn’t help you to resolve the Unknown function Fatal error, then report the same to Activision Support.Â
Hopefully, we can now expect that you guys have accurate content about the Warzone fatal error code. And, also a well-known method to fix the Unknown Function bug in COD: Warzone. Despite this, if any user has any queries share them with us in the comment section below.