How To Fix Warzone Dev Error 6634: A Quick Guide

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Though the Call of Duty: Warzone devs have done a great job at seamless game-play, there are still a few errors that pop up from time to time. One such error is “Dev Error 6634.” While this can be frustrating, there are a few steps you can take to try and fix it. In this blog post, we’ll run through some troubleshooting tips on how to fix Dev Error 6634 in Call of Duty: Warzone.

What is Dev Error 6634 in Call of Duty: Warzone?

Dev Error 6634 is a call of duty warzone error that can be caused by a number of things. Combatting problems that gamers come across in Call of Duty: Warzone is a challenge — the variety of circumstances that can cause dev error 6634 makes it difficult to pinpoint the exact cause. Most often, it is caused by an issue with your graphics card or driver. It can also be caused by corrupt game files, or outdated drivers.

Apparently, this dev error code has been popping up on the Modern Warfare and Warzone subreddits, but none of the posts are able to explain what causes it. The only real clue is that it might happen more often after game updates. So, there’s no definitive explanation for this error, but it seems to appear most frequently following game updates. If you are experiencing this error, there are a few things you can try to fix it.

What are some troubleshooting tips to fix Dev Error 6634 in Call of Duty: Warzone?

There is no one-size-fits-all answer to this question, as the cause of Dev Error 6634 in Call of Duty: Warzone can vary from person to person. However, there are a few troubleshooting tips that may help you fix the issue. Restarting the game, reinstalling the game, or updating your graphics drivers could potentially fix the issue. Also, make sure that your graphics card meets the minimum requirements for Warzone. If you’re still experiencing Dev Error 6634 after trying these tips, then unfortunately it may be indicative of a larger problem with your system. In this case, you’ll likely need to contact Activision support for further assistance.

Solution 1. You should only use Warzone cosmetics and skins

If you run into Dev 6634, your first step should be to make sure that you don’t have any Cold War cosmetics. It was once the only thing that would cause the error. Dev Error 6634 is one of the most dreaded errors in Call of Duty: Black Ops. You can avoid it by removing any Cold War cosmetics that you may have equipped.

Try updating your loadouts to the ones from Modern Warfare. This might be the result of the conflict between Black Ops Cold War and Modern Warfare, which is preventing many players from enjoying the game they’ve paid to play.

Many have found that changing loadouts from the Black Ops: Cold War to the Modern Warfare seemed to fix the issue — if you are using Cold War loadouts or operators, try switching them to Modern Warfare ones. Also, remove all of your skins.

Solution 2. Fix Warzone Dev Error 6634 by Updating Your Graphics Driver

Graphics drivers are among the most important elements of any gaming system, and GPU-intensive tasks like gaming can be easily hindered by outdated software which can causes compatibility issues in the first place. When you have an outdated driver and try to play a new game, it’s almost guaranteed that you’ll run into major issues. A laggy or buggy graphics driver can cause a number of issues from constant crashing to lagging and other graphical glitches. To stop this from happening, we always recommend gamers to keep their drivers up to date. A newer driver ensures stability and the best possible performance for your gaming rig.

So, the fixes are very simple — gamers should simply update their drivers to the latest version. For NVIDIA cards, go to the NVIDIA website and download the latest graphics drivers. For AMD cards, head to the AMD site and download the latest graphics drivers.

Solution 3. Verify Integrity of Game Files on Steam

Malfunctioning software can create a number of issues — corrupted files, pieces of hardware that don’t work correctly, and repeated crashes. When an error occurs in your game, it could be a problem with the integrity of the files. Scanning for integrity means locating these corrupted files so that you can then fix them.

This can occur for several reasons, one of which is the downloading of corrupted files. If you suspect this to be the cause of your crash, start by scanning and repairing your game’s files. This can be done by following these steps:

  1. Launch Steam and then click on Library. From there, you can right-click the game you want to play and select Properties.
  2. Now go to the ‘Local Files‘ tab and press ‘Verify Integrity of Game Files‘ button.
  3. Now you may have to wait a few minutes before steam verifies your game. Once it is verified, many files will be downloaded.
  4. Once the download finishes, hit the “Launch Game” button.

Through Repair Tool

  1. Open your client and from the left menu, select Call of Duty: MW. Then click Options and choose Scan and Repair.
  2. Now just click Begin Scan and sit back and wait to the complete the scan.
  3. When you have finished scanning the game, load it and play as usual.

Launch the game to ensure it works as intended. If it doesn’t, proceed to the next solution.

Solution 4. Update Windows To The Latest Version

It’s important to keep your computer up to date with the latest Windows updates. The latest version of Windows is often the greatest, with a slew of new features and functions to help you do more within a device that’s constantly on the go. These updates ensure that you’re using the latest version of Windows, which includes the latest drivers and other system features.

To update Windows, use the Start menu to search for “Windows Update,” then click on the “Check for updates” button, and install them. When the installation is complete, you can launch Call of Duty: Warzone without any problems.

You can check for Windows updates by following these steps:

  1. First, open the Settings app by pressing the Windows key + I on your keyboard. Then, click “Update & Security “.
  2. Next, under “Windows Update”,  click “Check for updates“. If any updates are available, they will be downloaded and installed automatically.
  3. You should now wait for the process to be completed, and then restart your PC.

Solution 5. Test Account To Fix Warzone Dev Error 6634

In rare cases, the dev error 6634 may happen because of certain accounts. This can be an issue with your specific account and not necessarily a bug in the game. If changing accounts also fixes the problem, compare both accounts to see what can be causing the error. It may be that you have a particularly buggy profile or a loadout that causes problems.

Solution 6. Restart Shaders Installation

Restarting the installation of the Warzone shader might fix the Dev Error 6634. Shaders are responsible for rendering graphics, so restarting the shader service might help fix the issue.

To restart them, follow these steps.

  1. Start COD Warzone and select Options. Next, click GRAPHICS.
  2. Next, click Restart Shaders Installation, and then click RESTART.
  3. Allow the process to complete.
  4. Now, restart your game and see if the problem still exists.

Solution 7. Free up your RAM and VRAM

Warzone is a demanding game, to say the least. It is a very resource intensive game by design and Players will often find their systems running slowly or even freezing during gameplay. If players are running it for an extended period of time, they may notice that their computer’s performance slows down or drops. This is usually caused by memory leaks – if Warzone overdraws video memory, it can leave images in VRAM. As you keep playing, it becomes harder and harder for your PC to clean this up, as there’s only so much memory a system can have.

So, if you’re experiencing the dreaded Dev Error 6634, it may be due to your RAM or VRAM being full. An excellent way to solve any performance issues that players experience is by restarting the game. This will reset the game’s memory usage and help avoid crashes.

Solution 8. Reinstall COD: Warzone

This is not a good method for most Warzone players to troubleshoot because of the sheer size of the game. While it’s not something players necessarily look forward to, installing Warzone and starting from scratch is a fairly effective troubleshooting method for minimizing issues during gameplay. Since it clears out your game files and resets your settings, the issue you’re experiencing may just be a relic of a previous run-through or corrupted files that are no longer compatible with the current version of the game. While it does take a long time to download Warzone and any updates, it’s an excellent way to make sure that error isn’t appearing due to corrupted game files.

About Call Of Duty: Warzone

Warzone is a free-to-play online game developed by Infinity Ward and published by Activision. It is a first-person shooter video game and the standalone battle royale component of Call of Duty: Modern Warfare. Like other battle royale games, Warzone features a large map with multiple zones that constantly contract, forcing players to move closer together until only one team or player is left alive. The game also features various in-game purchases for cosmetic items.


Hopefully, this article has helped you find a solution for this common error in Call of Duty: Warzone. If you’ve tried all of the above steps and are still not able to connect to the game, reach out to our customer service team for more help.

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