Modern Warfare 3 Dev Error 841 Fix

If you are suffering from the Modern Warfare 3 Beta Dev Error 841 bug, you are not alone. After weeks of teasers, the beta for Call of Duty MW3 is finally here! Those who plan to play on PlayStation consoles will have an opportunity to test the game before everyone else. Unfortunately, this also often means things like various errors and connection issues. In this guide, we explain what we know about the COD MW3 Dev Error 841 bug in the Beta, and if can possible be fixed.

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COD MW3 Dev Error 841 Explained
COD MW3 Dev Error 841 Explained

Can You Fix Call of Duty Modern Warfare 3 Dev Error 841

Let’s not mince our words here and tell you some fairy tales. Rather, let’s jump straight to the point. Unfortunately, there’s not much you can currently do in regards to the MW3 Beta Dev Error 841 on PlayStation 5 and PlayStation 4. Namely, the first early access beta has just gone live, and that unfortunately means a lot of issues to be ironed out. One of the most important things to be tested is the servers. Currently, based on our experience with the first few hours of the beta, Modern Warfare 3 Dev Error 841 is appearing constantly. Namely, the game will simply crash on the desktop, and this error appears.

And while you can get back into the game right after, you will lose progress and XP from the match. Thus, it is a rather frustrating experience. But, as we stated, there’s not much you can do. The good thing is that this is still only the first beta weekend. Hence, these kinds of things are to be expected. We can only hope that the developers will fix the issue ahead of the game’s full launch. For now, just make sure that everything is ok on your side. Do the basic troubleshooting that includes checking your internet connection, power-cycling your rooter, using Ethernet cable instead of WiFi, and so on. If we learn about any specific solution, we will make sure to update the article.

How to fix Dev Error 841 in MW3

We know that this is a piece of basic advice, but a speedy, steady, and uninterrupted Internet connection is a must for an always-online game such as Modern Warfare 3. Therefore, ensure your Internet is working correctly and without any interference. Check out other online games and see if they work without issues. If possible, always use an Ethernet cable instead of a WiFi network. Unstable WiFi networks are one of the main reasons behind high ping, lag and stuttering in Modern Warfare 3.

Reboot Your Network Device

In many cases, your Internet may run badly due to issues caused by your router or other network device. To prevent this, you should power cycle your router. To do this, follow these steps as listed below:

  • Turn off your router.
  • Unplug it from an electrical outlet.
  • Leave it unplugged for around 2 to 5 minutes.
  • Plug it back in and turn it on.

In addition, you may also perform a factory reset of the router to fix configuration errors and update your router firmware. Contact your Internet provider and router manufacturer for more information.

Port Forward Your Router for Modern Warfare 3

If you are having issues playing co-op with your friends, you might nee to do some port forwarding. Check out this guide for more details on how to do that.

Whitelist Modern Warfare 3 in Your Antivirus and Firewall Apps

Double-check if Modern Warfare 3 is whitelisted in your antivirus and firewall apps. The protection apps on your PC need to be sure that Call of Duty Modern Warfare 3 is a trusted app before allowing it to go online. Otherwise, it can interfere when the game tries to connect to the servers, which can result in Modern Warfare 3 Dev Error 841.

Release and Renew your IP & Flush your DNS

Our last resort asks for a bit more technical knowledge on your side, but it is often proven to be a great solution for connection issues. However, if you follow the process below, you might be able to fix Modern Warfare 3 Dev Error 841 completely. Here’s what you need to do:

  1. While on the desktop, press Windows Key and type CMD.
  2. Right-click Command Prompt and select Run as administrator.
  3. Type ipconfig /release in the command prompt and press the Enter/Return key on your keyboard.
  4. Wait a few seconds for a reply that the IP address has been released.
  5. Type ipconfig /renew in the command prompt and press the Enter/Return key on your keyboard.
  6. Wait a few seconds for a reply that the IP address has been re-established.
  7. Type ipconfig /flushdns in the command prompt and press the Enter/Return key on your keyboard.
  8. Close the command prompt and attempt to make a connection.
Author Chronocrator profile picture
Nikola was a senior editor and writer at Gosunoob.With over 12 (since 2012) years of experience in esports & gaming journalism, I like to think that my guides once helped a NASA scientist to beat a game. What I'm trying to say is that I should be credited for NASA's Mars missions. (I'm just kidding, please don't shoot me). In my free time, I dream of the day when I will finally start clearing my Steam backlog.