How to fix CoD: Warzone & Modern Warfare Dev Error 6034

Liam Mackay
cod warzone modern warfare season 2 error 6034

Warzone and Modern Warfare users will encounter the “Dev Error 6034” bug from time to time in Call of Duty, and we have a quick and simple fix for the issue.

It’s no secret that Warzone has had the odd hiccup here and there with Warzone Season 2 Reloaded being troubled by more problems. Whether it’s the return of the dreaded Stim Glitch or more invisibility worries, there always seems to be a frustrating niggle or two to contend with.

But one bug that always rears its head is the Dev Error 6034 bug that prevents players from dropping in to slay zombies in Verdansk, or enjoy Modern Warfare’s surprising new content.

The ‘Error 6034’ bug first appeared in Modern Warfare shortly after launch, and because Warzone is connected to Modern Warfare, battle royale players have encountered it too.

Follow our quick and easy guide and you should be rid of the problem in no time.

How to fix Dev Error 6034 in Warzone & Modern Warfare

CoD Warzone gameplay

Whilst there is still no official word from Activision about what causes the problem, it’s believed that Dev Error 6034 happens when Modern Warfare files become corrupted or unreadable.

A clean reinstall of the game is known to fix the issue, but there’s a much quicker solution to alleviate the problem. What you have to do is locate specific files in the Modern Warfare folder, delete them, then run a Scan and Repair which will replace the files with the correct versions.

Here’s a guide to the full process:

  1. Open the Modern Warfare or Warzone installation folder
  2. Locate and delete the following files: .patch.result, .product, vivoxsdk_x64.dll, Launcher.db, Modern Warfare Launcher.exe
  3. Now, open
  4. Select the Options’ dropdown
  5. Then run Scan and Repair on Modern Warfare and/or Warzone
  6. These deleted files will now be replaced with working ones, and you can play Warzone again.

To prevent this problem from returning, make sure that Warzone downloads are uninterrupted. Leave your PC on until the download is complete, and avoid pausing and resuming the download when possible.

Now hop onto Warzone error free and enjoy the new streaks before Season 3 begins.

Image Credits: Activision

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