Resolve Dev Error 1202 errors in Call of Duty: Modern Warfare or Warzone

It's not uncommon to encounter a Dev Error 1202 error while playing Call of Duty: Modern Warfare or Warzone, and it's very frustrating. Fortunately, this article will provide some practical ways to solve this problem quickly and easily.

Dev Error 1202 Error

You may repeatedly encounter Dev Error 1202 errors on your PC or game console. Don't worry, this error is not unsolvable. The problem can be easily solved as long as you try the following methods.

How to fix Modern Warfare Dev Error 1202 error (Windows 10/11)?

Method 1: Hosting the game as a free player

This method proves to be the best solution to the Dev Error 1202 error. Usually, this error occurs when players with the full version of Modern Warfare try to connect to the free multiplayer lobby. If you have the full game, you should not host the lobby. In this case, you can join a game hosted by free players.

Step 1. Let the free players in your team host the game and then send you an invitation.

Step 2. Join the game by invitation.

Method 2: Update the game

Outdated game installation is also another reason for the Dev Error 1202 error. Due to potential incompatibility, the operating system prevents execution of important game modules. Therefore, it is recommended to update the game to the latest version.

Step 1. Launch Battle.net and find Call of Duty: Modern Warfare/Warzone in the game library.

Step 2. Click the gear icon to open the options , and then click Check for updates in the drop-down menu.

Step 3. If there is an update available, download and install it to see if the Dev Error 1202 error disappears.

Method 3: Reduce the GPU driver version

Call of Duty: Modern Warfare and Warzone will not load the necessary modules if the latest graphics drivers are incompatible with your system. In this case, you can choose to roll back the graphics card driver.

Step 1. Press Win X key at the same time to open the Quick Menu and click Device Manager .

Step 2. Expand the Display Adapter and you can see your graphics card.

Step 3. Right-click it and select Properties .

Step 4. In the Driver tab, click Rollback Driver .

Step 5. After the rollback is complete, restart the computer.

Method 4: Start the game in DirectX 11 mode

Call of Duty Dev Error 1202 error will also appear if you run the game in the latest DirectX version (DirectX 12). In this case, it might be helpful to start the game in DirectX 11 mode.

Step 1. Launch Battle.net and select Call of Duty: Modern Warfare or Warzone.

Step 2. Expand Options and select Game Settings .

Step 3. In the game settings , check the additional command line parameters and enter -d3d11 in the box.

Step 4. Click Finish to save the changes.

Method 5: Reinstall the game

If none of the above methods apply, the last solution is to reinstall the game. The game installation may be damaged for some reason. Note that this method is time consuming but effective. The operation steps are as follows:

Step 1. Open the Battle.net launcher and select the game from the game list.

Step 2. Go to Options > Uninstall the game .

Step 3. After the uninstallation is complete, restart the computer and restart the game to see if the "War Zone" Dev Error 1202 error still exists.

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