How to Fix DEV ERROR 12502 in Call of Duty?

The Dev Error 12502 describes a certain issue that took place between the software and hardware elements of your computer. Some of the most common causes of this problem include damaged game files, issues in applications, and faulty hardware. 

Fix DEV ERROR 12502 in Call of Duty

Incompatible operating system settings and older versions of games are other possible reasons for this error.

One needs to update both the drivers of the game as well as the drivers of the system

Make sure your drivers are up-to-date, and so is your game, since using outdated drivers or not updating them could be a potential cause of this problem. It could also be an issue simply because your drivers are too old to run the newly updated graphics or system requirements. Slightly in relation, problems may arise if you happen to be on an older version of the game that doesn't get bug updates.

NVidia users: Most up-to-date drivers are located on the NVidia website. Otherwise, you can use their GeForce Experience application to detect and will automatically download the drivers for you.

Attention AMD Drivers: For the latest drivers, tailored for your exact GPU, head on over to the official AMD site. Alternatively, you may also use the AMD Radeon Software; that driver utility may automatically detect your system and download the necessary drivers itself.

2. Empty Cache

Cache files build up corruption over time, or become incompatible with updates of the game later on, which is where various problems pop up from, including Dev Error 125002. Clear the cache now to repair this error and to make the game run much smoother. This will delete any corrupted or incompatible files.

System Log Files

Press Windows + R for opening Run dialog.

Type in temperature and press Enter.

It will open a folder that contains all the cache files. Select all the files and then delete them.

In the Run dialog box type %tmp% again.

Select all the files, and then delete them.

And shut down your computer.

Steam Archive Files

Open Steam.

Go to the Settings menu.

On the left pane, click on Download.

Then, locate Clear Download Cache and click on it.

The main difference between how clearing of cache occurs is between desktops and consoles. If you want to know how it is done on your Xbox or PlayStation, look for detailed articles about them on our website.

3. adjust display options.

Dev Error 12502 may occur when your low-end component system fails to take the in-game load demands. Lower the in-game graphics settings if you want to solve it by reducing system load while playing. You can reduce excessive usage of resources resulting in crashing by reducing texture quality or resolution.

Dial up in-game options.

Under the menu that will pop up at the top, click "Quality".

Turn off the Light on Quality Presets.

You will be prompted to restart the game for changes to take effect.

Restart your computer.

Smoothen Out the Graphics Settings

File verification is a process by which files are checked for corruption, loss, and damage. It makes sure that your installation of the game is pretty stable. It scans your system file system against that of the server system of the game and replaces corrupted files or repairs them.

About Steam

Open your steam and then click Library.

Right-click on the Call of Duty: Modern Warfare 3, now from the context menu select Properties.

Inside the Properties window, click Installed Files.

Now click on the option "Verify Integrity of Game Files"

Steam will try to replace any files that show up as damaged and missing, along with many other things.

From Battle.net,

Open Battle.net, click the Games tab.

From the list of games, click Modern Warfare 3: Call of Duty.

Click the gear icon beside the play button; it says Options.

Click on Scan and Repair.

Battle.net will scan for corruption in game files or any files that have gone missing and then repair them.

4. Restart the Game

It is worth trying the uninstallation and reinstalling of the game, which will remove corrupted game files and install them anew, in case the problem still exists after trying everything above. File corruption or misconfigurations due to previous installations, upgrades, or gamming will not exist in files obtained from a freshly installed game.

Burning fuel

Start Steam and go to the Library.

To uninstall Call of Duty: Modern Warfare 3, right-click the icon and then select Manage.

After it has prompted you and you approve the uninstallation through Steam, this will unplug the game from your computer.

From here on, you can now reinstall the game.

The online war platform

Open the Battle.net account and click on Games.

You will see Call of Duty: Modern Warfare 3 available game

The gear icon, Options, beside the play button, simply click on it.

To do this, click Uninstall and confirm.

After uninstallation of the game is done, you can install it again from the page of the game.

These steps will likely get rid of the DEV ERROR 12502 so you can play Call of Duty seamlessly.