Fixed: Modern Warfare Dev Error 6178 [2023]

Modern Warfare users have been encountering the Dev Error 6178 that crashes the game. Here are 12 methods that could help you fix this error.

A large number of Call of Duty: Modern Warfare players have been experiencing random crashes to the desktop with a dialog box appearing at the time of the crash that reads “Fatal Error: Dev Error 6178“. This error mostly appears while the map is loading. This is a very frustrating error because it makes the game unplayable for a lot of users. Keep in mind, this error  is specific, however, related Errors in Modern Warfare Include the Dev Error 6068.

Key Highlights
  • Fatal Error: Dev Error 6178 can show up in a small dialogue box after Modern Warfare randomly crashes.
  • You might experience Dev Error 6178 due to several reasons, these include wrong game settings, corrupt game files, outdated graphic drivers, and many more.
  • The first thing you should try is updating your graphic drivers, as an outdated graphic driver is one of the biggest reasons players might encounter Dev Error 6178.
  • If you have in-game overlay enabled, it is a good idea to disable it, as a lot of these overlays can hinder performance and cause a lot of crashing issues.
  • It is a good idea to close any unnecessary background applications using the task manager, as a lot of these apps can bring down your performance for no reason.
  • There is a chance that Dev Error 6178 is happening because you are not launching Modern Warfare with admin privileges. If so, then you should enable running the game as an administrator in the properties of Modern Warfare.
  • You should try using the official launcher to repair any missing or corrupted game files, as they might be what is causing Dev Error 6178.
  • Some of the players have managed to fix Dev Error 6178 by setting Modern Warfare as a high priority program in the Task Manager.
  • You should try changing your graphic settings in Modern Warfare to either normal or high, as some players have reported that simply changing the graphic settings got rid of Dev Error 6178.
  • You might also be able to fix Dev Error 6178 by disabling the G-Sync located in the NVIDIA Control Panel
  • If you are on an outdated version of Windows 10 then you should quickly update to the latest version, as an outdated version can cause some glitches and might be the culprit behind Dev Error 6178.
  • You should try playing Modern Warfare while in windowed mode if you are not already, as it can sometimes help resolve Dev Error 6178.
  • You can also fix Dev Error 6178 by making your pagefile in Windows larger, as a pagefile that does not have enough space can cause constant crashing in several games.
  • Finally, you can try to reinstall Modern Warfare so that you can fix Dev Error 6178, as it can reset a lot of your settings to default and download fresh files.
  • If none of these methods have worked for you and Dev Error 6178 persists, you can try to contact support and explain your problem to them so that you can get professional help.

How to fix Dev Error 6178?

Dev Error 6178 could occur due to various reasons such as outdated graphics drivers, program conflicts, corrupt game files, incorrect game settings. This guide will discuss 12 different methods that could troubleshoot Modern Warfare. These methods have helped fix the error for a lot of users. Hopefully, they will also help you in getting rid of the error and get you right back into the game in no time.

Update Your Graphics Driver

If you are getting Dev Error in Modern Warfare, there is a big chance that the error occurred due to outdated graphics drivers. You should always update your GPU drivers to the latest version whenever it becomes available. Updating your graphics drivers can sometimes help solve the game crashing issue and also fix other performance problems. Here are the links for NVIDIA and AMD’s graphics driver download pages. 

Disabling In-Game Overlay

Sometimes the overlay features of other applications could cause performance problems and crashing issues. NVIDIA and AMD also have their own overlays that you can turn off from the settings tab. You should also turn off any other apps’ overlay features like Origin, Discord, Teamspeak as they could also be conflicting with your game and causing it to crash. Therefore, we recommend turning off any overlay apps that you might have running in the computer background.

Close Unwanted Programs

If you have too many programs running in the background, it could affect the performance of your computer and cause games to crash. Close any background application from the system tray or the task manager that you might not be using at that moment. After doing so launch the Modern Warfare application to see if the crashing persists.

Run Game as Administrator

Dev Error 6178 could also occur due to the program not running with administrator privileges. You should try running the Modern Warfare application as an administrator. Doing this will give the Modern Warfare executable file full access to any of the game files on your PC. To run the program as an administrator follow the steps below.

  1. Right-click the Modern Warfare Application on your desktop and select Properties.
  2. Head to the Compatibility tab
  3. Tick-mark the Run this program as an administrator box.
    Modern Warfare Dev Error 6178
    Run program as administrator.
  4. Click OK.
  5. Run Modern Warfare to see if the problem is resolved.

Repair Game Files Via

Repairing Modern Warfare through could replace any of the corrupt game files that could be causing the game to crash. We recommend trying this method before you jump to other solutions as it could easily solve Dev Error 6178.

  1. First, launch the Blizzard launcher.
  2. Head to the games tab and select Modern Warfare.
  3. Click on Options, on the left side of Redeem a Code.
  4. Now select Scan and Repair.
  5. Wait for verification to complete.

After the scan completes, try running the game to see if the problem is solved.

Set High Priority in Task Manager

According to some users, the Modern Warfare Dev Error was fixed by simply changing the processor priority from Normal or Low to High in the Task Manager. We recommend you try this method out before jumping to other solutions mentioned below. Follow these steps to change Modern Warfare to High priority in the Task Manager.

  1. Open the Task Manager by pressing Alt + Control +Delete.
    Set High Priority
    Task Manager.
  2. Now head to the Details Tab.
    Set High Priority
    Details Tab in Task Manager.
  3. Search for Modern Warfare in the list of programs.
  4. Right-click the program and change the priority to High.
    Set High Priority
    Changing Priority.
  5. See if the error still occurs while playing the game.

Change Graphics Settings

Some users have reported that setting the texture resolution to Normal or High can fix the Modern Warfare Dev Error 6178.

  1. Open Call of Duty Modern Warfare.
  2. Head over to Settings > Graphics.
  3. Under Details & Texture settings, change Texture Resolution to either Normal or High.
    Graphics Settings
    Graphics Settings.
  4. Restart the game to see if the problem is solved.

Turn off Nvidia G-Sync

Some NVIDIA users were able to fix the Dev Error by disabling the G-Sync from the NVIDIA Control Panel. 

  1. Right-click on the desktop and click on NVIDIA Control Panel.
    Disable G-Sync.
    NVIDIA Control Panel.
  2. Click on the plus sign next to “Display” on the left to expand the list and choose Set up G-Sync.
  3. Uncheck the box next to Enable G-Sync and apply the settings.
    Dev Error 6178 - Disable G-Sync.
    Disabling G-Sync
  4. Restart your computer and see if you still encounter the error.

Update Windows 10

Windows Updates can help you fix any bugs that could be causing performance problems and errors. We recommend you try this method as it could fix the Modern Warfare Dev Error.

  1. Open the Windows Search Menu by pressing the Windows key on your keyboard.
  2. Type Windows Update in the search box, select the Check for updates option.
    Update Windows 10
    Windows Update.
  3. Click on Check for updates, Windows will search and download the latest update.
    Update Windows 10
    Check for Updates.
  4. After the download is complete, restart your computer to install the update.

Run Modern Warfare to see if the problem is fixed.

Play in Windowed Mode

Playing in windowed has also helped some Modern Warfare users fix the Error 6178. 

  1. Launch Call of Duty Modern Warfare.
  2. Head over to Options > Graphics.
  3. Under Display Settings, Change Display Mode to Windowed.
    Modern Warfare Windowed Mode
    Graphics Settings – Display Mode.
  4. Play the game to check if Dev Error 6178 still occurs.

Enlarge Pagefile on Windows

Some users were able to troubleshoot the error by enlarging the pagefile on their Windows. if the Windows Pagefile does not have enough space, it could make games and other softwares crash.

To enlarge the pagefile on Windows, carefully follow all of the steps below.

    1. Press Windows key+ R, type in sysdm.cpl, and press Enter.
      Enlarge Pagefile on Windows
      Windows Run.


  1. In The System Properties Window, Open The Advanced Tab.
  2. Click on “Settings” under “Performance”. A new window “Performance Options” will open.
    Enlarge Pagefile on Windows
    Advanced Settings.
  3. Click on “Advanced” and then press “Change”. A new window “Virtual Memory” will open.
    Enlarge Pagefile on Windows
    Changing Virtual Memory.
  4. Deselect “Automatically manage paging file size for all drives” and select “Custom size” under the drive of your choice.
    Enlarge Pagefile on Windows
    Managing Pagefile Size.
  5. Set the initial size for your paging file in MB according to the paging file size for the drive already listed (if applicable), then enter your custom maximum size, which shouldn’t exceed 4 times the size of your RAM for system stability. Don’t forget to click “Set” so that the changes will apply.
  6. Restart your computer.

Note: Ideally, the size of your paging file should be 1.5 times your physical memory at a minimum and up to 4 times the physical memory at most to ensure system stability. if your PC has 8 GB RAM. You can calculate your minimum paging file size with this equation: 8 GB x 1.5, and your maximum paging file size with this one: 8 GB x 4. The totals would be 12 GB and 32 GB of RAM respectively.

Reinstall the Game

Sometimes is unable to identify some corrupt game files during the repairing process. The only way to solve this problem is by completely reinstalling the game. Make sure to not pause the download process as it could damage the game file that is being downloaded, this is a known issue in Blizzard’s client.

  1. Launch Blizzard client on your computer.
  2. Find and click on Call of Duty Modern Warfare from the list on the left.
  3. Now on the right side, click on the Options drop-down menu and choose Uninstall Game.
  4. After the game uninstalls, download Modern Warfare again.
  5. Run the game to see if Dev Error is resolved.


That concludes our Modern Warfare Dev Error 6178 troubleshooting guide. All of these methods were proven to be very effective in fixing the Fatal Error 6178 by a large number of Modern Warfare users. We hope you are also able to successfully troubleshoot this error by following these solutions. If the error still occurs after trying these solutions, contact Support and they will help you in identifying the exact cause of the problem after you provide them with all of the necessary information.

Are you experiencing performance issues in Modern Warfare and want to know the best settings for high frame rate and maximum performance? Then check out our guide on How To Get High FPS In Call of Duty: Warzone.

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Haider Khan

PC gaming geek with three years of content writing experience - covering Video Game Settings, and errors across all devices.

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