MW2: How to Fix Dev Error 6144 in Modern Warfare 2 and Warzone

Encountering Dev Error 6144 while playing MW2? Here are some potential fixes.

Image via Activision/Blizzard

You go to load up MW2 to frag your friends — or some noobs — only to have the game abruptly stop working. Bummer. If you’re getting hit with Dev Error 6144 when you start Modern Warfare 2 or Warzone, being a little bit frustrated is definitely understandable. Here’s what Dev Error 6144 means and what you can do to fix it.

What is Dev Error 6144 in MW2?

While most issues with online games typically relate to server problems, Dev Error 6144, unfortunately, has to do with the system running MW2 or the game files themselves. Issues that can cause this error include:

  • Out of date drivers.
  • Corrupt or missing game files.
  • Overlay conflicts.
  • Missing game resources.

Is There a Fix for Dev Error 6144?

Since there are multiple potential causes for Dev Error 6144, it can take a bit of work to resolve it. However, there are a few things you can do to (hopefully) eradicate it.

  • Restart your system: Restarting is the magic cure-all first step that can resolve a lot of tech issues. It’s one of the primary ways to fix Dev Error 6144.
  • Verify your game files: When you verify files, any missing or corrupted files are replaced, which can cause a plethora of potential issues to surface, including this one for Modern Warfare 2 and Warzone.
  • Check/update your drivers: Check that your drivers are up to date. If not, update them to the latest version. Here’s how to update Nvidia drivers and AMD drivers.
  • Disable overlays: Sometimes, the overlays you use can cause conflicts with other programs. Disable any overlays you have running to see if that fixes Dev Error 6144 for MW2.
  • Check your system memory: This doesn’t apply to console players, but MW2 on PC requires a minimum of 8 GB RAM to run, so you want to ensure that you’ve got that much available. Consider closing any non-essential programs via Task Manager. Doing so also reduces the load on your CPU, which can be helpful.
  • Drop game settings: If your rig only meets the minimum requirements for Modern Warfare 2 or Warzone, you’ll run into issues. Make sure to drop your settings to match those recommended requirements. If you’re running the game on Ultra, for example, with all the fine details turned up, it will stress your system, potentially causing Dev Error 6144.
  • Submit a support ticket: If all else fails, submit a support ticket on the Activision support site with your system information and the error. The team should be able to provide more in-depth help specific to your system or at least look into the issue to remedy it on a larger scale.

Those are the potential fixes for Dev Error 6144 in Modern Warfare 2 and Call of Duty Warzone. Hopefully, these get you back to fraggin’.

About the author

Ashley Erickson

Ashley, otherwise known as Glitchiee, is an avid gamer of RPGs, TTRPGS, farming sims, The Sims, and a variety of games in between. Playing on the NES and SNES, collecting 1st gen Pokemon cards, and playing on her Gameboy color are some of her favorite memories from early childhood. Combined with a passion for writing, Ashley is focused on bringing the best news, guides, reviews and lists the industry has to offer.