Other possible reasons include broken game files, old network drivers, or problems with your internet provider. Now that you know the main reasons for Error code 4049, here are the solutions that have helped other players fix this problem:
1. Close Problematic Game Processes
One common cause for Error code 4049 is when the game is closed, but some of its background processes keep running. When you try to open Blade and Soul again, the game finds these leftover processes and shows the error because it wasn’t expecting them to still be running. To fix this, you can use Task Manager to close these processes before starting the game again:
BnSCefSubProcess.exeGameMon.DesClient.exe
Players have reported that when they end these processes in Task Manager, Error code 4049 no longer appears. Note: You can also just restart your computer, and then open the Blade and Soul launcher right after startup to achieve the same result.
2. Download the Latest Version of the Launcher
Blade and Soul’s developers (NCSOFT) have made a new game launcher, and the old one is no longer supported. If you’re still using the old launcher, you will get Error code 4049. Many players have fixed the issue by removing the old launcher and installing the latest one.
3. Update GameGuard by Reinstalling Blade and Soul
A lot of players see Error code 4049 because there’s a problem with the GameGuard files (the game’s anti-cheat software). To fix this, it’s best to uninstall Blade and Soul, and then reinstall the latest version from the official website. This ensures you have the correct, updated GameGuard files. Note: It’s risky to try and manually copy GameGuard files from other sources. Reinstalling the game is the safest method.
4. Start the Razer Chroma SDK Service (for Razer Devices)
If you have Razer peripherals, Error 4049 can sometimes occur if the Razer Chroma SDK service is turned off. The NC Launcher may not work properly with Razer drivers unless this service is enabled.
5. Reinstall Razer Synapse (for Razer Users)
If you use Razer devices and the previous method didn’t help, try uninstalling and reinstalling the Razer Synapse software. Some older versions of Synapse could cause conflicts, especially on Windows 10, but newer updates have addressed these problems.
6. Update Your Graphics Card (GPU) Drivers
Sometimes Error 4049 appears because your graphics drivers are outdated or corrupted. Keeping your graphics card and physics drivers updated can solve this problem.
7. Turn Off or Uninstall Third-Party Antivirus or Firewall
In some cases, the GameGuard anti-cheat engine in Blade and Soul can mistake your antivirus or firewall software for a threat, stopping the game from launching. Important: If it’s your firewall causing the problem, disabling it might not be enough—you may need to uninstall it to fix the issue. Try turning off your antivirus first (usually you can right-click its icon in the system tray and select disable): If this doesn’t work, here’s how to uninstall your third-party antivirus/firewall:
