Dev Error 6034 XBox One

Dev error 6034 on Xbox signifies that incompatible (or obsolete) data packs or add-ons of Modern Warfare are loaded on the console. Furthermore, the issue at hand may be brought on by a faulty installation of the game.

The issue develops when a player tries to launch the Modern Warfare on Xbox but meets the dev error 6034. Not just one Modern Warfare map is affected; it seems to affect them all.

In order to proceed with the fixes, you should first determine whether or not the Modern Warfare game files are stored in two different locations (e.g., internal and external).

Dev Error 6034 XBox One

If this is the case, you should see if moving the game files to the internal storage unit resolves the problem at hand.

How to Fix Dev Error 6034 in Modern Warfare

An increase in reports of the Dev Error 6034, which causes the game to crash repeatedly, was precipitated by a recent update to Warzone.

And it has been most frequently observed in the game’s battle royale mode. Don’t panic if you’re experiencing the same problem.

According to our customers, there’re already various remedies that might help you get rid of the issue right immediately.

Solution 1: Restart the Game (PC/Xbox)

A quick and easy solution to the Xbox One Dev error 6034 is to restart the game and the device. By doing so, a transient bug or cache can be cleaned out.

Close Call of Duty: Warzone/Modern Warfare normally and see whether the error disappears. You can try restarting your computer or Xbox One device if the problem persists.

If restarting the device does not solve the problem, try one of the other solutions below.

Solution 2: Clear the Cache (Xbox)

Over time, corruption in the Xbox One’s cache could lead to the occurrence of Dev error 6034 Warzone Xbox. Your console’s cache files may need to be cleared in order to get rid of the problem.

Step 1. Press and hold the Power button until your console is totally turned down (All lights are off) (All lights are off).

Step 2. Unplug the power cable from your console and wait for at least 30 seconds to give enough time for the cached data to be cleaned out.

Step 3. Reconnect the power cord to the console and wait at least a minute for the white light to turn orange on the power brick.

Step 4. Power on the Xbox and try starting the game again to see whether the Modern Warfare Dev error 6034 has been resolved.

Solution 3: Clear the Reserved Space (Xbox)

The Dev error 6034 Xbox One could occur if the game has trouble accessing the designated area. In this situation, you can attempt to free up the game’s reserved area.

Step 1: Boot up your Xbox One and load up Call of Duty: Modern Warfare/Warzone, selecting the game from the home screen.

Step 2: From the context menu, select Manage game & add-ons; then, from the Saved Data subcategory, select Reserved Space from the right panel.

Step 3: When prompted, select Clear reserved space and then click Confirm.

After that, you may try restarting your Xbox to see if the MW Dev problem 6034 has been fixed.


Players on Xbox One, PC, and PS4 are reporting dev error 6034 while playing Call of Duty: Modern Warfare. Certain users are experiencing game crashes with the corresponding Dev Error 6634.

The maximum amount of surface area that can be allocated to the Unified Geometry Buffer has been achieved.

There are a few potential causes of COD Warzone dev error 6034, the most common of which being a loss of network connection or corrupted game data.