As an avid Call of Duty player, I know how frustrating Dev Error 6034 can be. One minute you‘re loading into a match, excited to pwn some noobs. The next, your Xbox unceremoniously crashes and you‘re met with a cryptic error code.
Not being able to play your favorite game suuucks. But fear not my friend, today I‘ll show you how to fix Dev Error 6034 once and for all!
What The Heck is Dev Error 6034?
Before we dig into solutions, let‘s break down what causes this pesky error.
Dev Error 6034 happens when your Xbox tries to load outdated multiplayer data packs that conflict with newer versions of the game. You may have noticed it only occurs specifically in online modes.
According to Activision‘s support page, this mismatch causes Modern Warfare or Warzone to abruptly crash, usually when loading a map. Some gamers only see the error occasionally, while others can‘t play at all without Dev Error 6034 interrupting matches.
So how common is this issue? Looking at popular Modern Warfare reddits and forums, Dev Error 6034 posts frequently trend, with some threads having 300+ comments from players encountering crashes. It affects a huge part of the COD community across Xbox, PlayStation and PC.
Now let‘s get into the good stuff: how you can fix Dev Error 6034 today! I‘ll walk through solutions from easiest to most involved.
Method #1: Remove Those Problematic Multiplayer Packs!
The simplest fix is to uninstall those outdated multiplayer data packs causing conflicts. The game will then download fresh versions that (hopefully!) work properly.
Follow these steps on your Xbox One:
- Press the Xbox button then head to My Games & Apps
- Scroll to Call of Duty: Modern Warfare and press the button showing ⋮ (menu)
- Select Manage game & add-ons
- Press A to deselect all multiplayer data packs except the 22 GB Multiplayer Pack 2
I‘ll show images below so you know exactly which pack to keep:
Keep Multiplayer Pack 2 installed, uninstall any others
- Once other packs are deselected, press Save Changes
This will delete all those pesky conflicting data packs. When you relaunch Modern Warfare it may re-download updated versions automatically. Give it a shot and see if you still faceplant into Dev Error 6034!
Method #2: Power Cycling Your Xbox
If the multiplayer pack trick doesn‘t work, we‘ll try force quitting your Xbox next.
Press and hold the power button on your console for 10 seconds. This will force a hard shutdown. Unplug all cables from the back as well, wait 60 seconds, then plug everything back in.
When your Xbox boots up, it will check all installed games and data packs, potentially fixing any issues.
Power cycling flushes out any gremlins, rebuilds the system cache and clears errors. It‘s an essential troubleshooting step for any Xbox issues.
Method #3: Nuclear Option – Reinstall Entire Game
So you uninstalled data packs, power cycled your Xbox, sacrificed a goat to the Call of Duty gods and still have Dev Error 6034?
As a last resort, you may need to reinstall Call of Duty completely. I know, I know…it‘s a gigantic game. This will delete and re-download the entire 100+ GB.
But a clean install ensures all game files are fresh and working properly. Follow these steps:
- From My Games & Apps, press Menu on Call of Duty Modern Warfare
- Select the nuclear Uninstall All button
- Return to your Game Library and re-download
Hopefully with this scorched earth approach, Dev Error 6034 goes away for good!
Summarizing the Fixes
Let‘s recap all potential solutions for Dev Error 6034 covered today:
| Method | Effort | Success Rate |
|---|---|---|
| Uninstall multiplayer packs | Easy | High |
| Power cycle Xbox | Medium | Varies |
| Reinstall game | Hard | High |
I‘d always start with Method 1 as it‘s quick and effective for most people. If you still faceplant into Dev Error 6034 after trying all steps, submit a ticket to Xbox support.
Hopefully today‘s troubleshooting guide equips you to enfin slay this beast! Let me know if you have any other questions fixing Dev Error 6034 or Call of Duty crashes in general.
Game on my friend 👊
