Lỗi 4049 Blade And Soul

Some Blade and Soul players are reportedly seeing the Error code 4049 every time they attempt to launch the game. This issue is reported to occur on Windows 7, Windows 8.1, and Windows 10.

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Blade and Soul Error 4049

After investigating this particular issue thoroughly, it turns out that there are several underlying culprits that might be responsible for this error code. Here’s a list of potential scenarios that might trigger this error:

Game processes are stuck in a limbo state – There are several BnS game processes (BnSCefSubProcess.exe, GameMon.Des, Client.exe) that have a tendency to become stuck in a limbo state. If this is the main cause of the issue, you should be able to resolve the issue by using Task Manager to close the remnant processes that are still open before re-launching the game.Outdated NCSOFT launcher version – Because the developers of NCSOFT have recently deprecated the functionality of the old launcher, you’ll need to migrate to the new launcher before you’ll be able to launch the game without this error again.Deprecated GameGuard version – As it turns out, you can also expect to encounter the 4049 error code due to a deprecated version of the anti-cheat engine that the game no longer accepts. In this case, you can resolve the issue by replacing the GameGuard version or by uninstalling the current game version and installing the latest build (along with the latest GameGuard version).The Razer Chroma SDK Service is Disabled – If you’re using Razer peripherals, you should take the time to investigate the current status of the Razer Chroma SDK service and enable it if it’s currently disabled. As it turns out, the newer version of NC launcher is known to conflict with certain peripheral drivers while the SDK service is disabled.Conflict with the Razer Synapse utility – On Windows 10, you can expect to see this issue popping up when you attempt to launch the game due to a conflict with certain Razer peripherals hosted inside the Synapse utility. Several affected users have reported that they’ve been able to resolve this particular issue by reinstalling the Synapse utility.Outdated GPU drivers – As it turns out, an outdated or partially corrupted dedicated GPU driver can also trigger this particular error code. If this scenario is applicable, you should be able to fix the issue by updated the main GPU driver + the physics module to the latest version.

Now that you are familiar with every potential fix that might be triggering the Error code 4049, here’s a list of methods that other affected users have successfully used to get to the bottom of this issue:

Method 1: Closing Problematic Services

As it turns out, one of the most common scenarios that might trigger this error Error code 4049 is when you close the game, but some game processes are left behind running long after the main instance of the game is closed.

In this case, when you try to launch the game once again you’ll get this error as the game doesn’t expect certain game dependencies to be already opened.

If this scenario is applicable, you should be able to fix the issue by using Task Manager to ensure that the following processes are completely closed before launching Blade and Soul once again:


Several affected users have reported that once they closed these processes down via Task Manager and restarted the game, the Error code 4049 no longer appeared when they launched Blade and Soul.

If you’re looking for specific instructions on how to ensure that these problematic services are closed, follow the steps below:

Note: If you don’t want to go through the steps below, you should also be able to resolve the issue by restarting and opening the BnS launcher immediately after the next startup is complete.

Press Ctrl + Shift + Esc to open Task Manager. If Task Manager opens with the simple interface, click on More details to open the Expert interface.
Opening the Expert menu of Task ManagerOnce you’re inside the advanced menu of Task Manager, access the Processes tab and look for the following processes:

BnSCefSubProcess.exeGameMon.DesClient.exeAs you locate them one by one, right-click on each of them and click on End Task to close them.

Ending the Task inside Task ManagerOnce every relevant process has been closed, close Task Manager and launch the BnS Launcher once again to see if the issue is now fixed.In case the launcher of Blade and Soul still displays the same Error code 4049, move down to the next potential fix below.

Method 2: Downloading the latest Version of the Launcher

Keep in mind that the developers of Blade & Soul (NCSOFT) have recently revamped their internal launcher that is used to launch Blade and Soul.

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Until recently, it was possible to launch the game on both the new launcher and the old one, but since the beginning of 2021 the old launcher has been completely deprecated and you need the new built-in order to play the game.

Several affected users that were also dealing with this issue have reported that the 4049 error was finally resolved after they got rid of the old launcher and downloaded the new one.

If you’re looking for instructions on how to do this, here’s a breakdown of the steps you need to take:

Once you’re inside, hit the Download button and wait until the latest version of the NCLauncher installer is downloaded to your computer.
Downloading the latest BnS launcher versionAfter the download is finally complete, double-click on the installer and click Yes when prompted by the UAC (User Account Control) to grant admin access to the installation process.Inside the installation window of the NC Launcher 2, follow the on-screen prompts to complete the operation, then restart your computer once again.
Installing the latest version of the launcherOnce your computer boots back up, launch Blade & Soul from the new launcher and see if the issue is now fixed.

If the same Error code 4049 is still occurring or you were already using the latest version of the BnS launcher, move down to the next method below.

Method 3: Replacing the old GameGuard Version

According to a lot of affected users, you can expect to see the error code 4049 occurring due to a glitch with the GameGuard dependencies that are part of the anti-cheat engine implemented inside Blade and Soul.

If you find yourself in this particular scenario, the best thing you can do is uninstall your current installation of Blade and Soul before reinstalling the latest version via the official channels.

Note: There’s also the option to specifically replace the problematic GameGuard files, but we don’t recommend this approach since you might end up using an outdated version of the anti-cheat engine.

If you think this scenario is applicable, follow the instructions to uninstall the current version of Blade and Soul before reinstalling the latest via the official channels:

Start by ensuring that Blade and Souls is closed as well as it’s background and no process of the game is running in the background (see Method 1).Press Windows key + R to open up a Run dialog box. Inside the text box, type ‘appwiz.cpl’ and press Enter to open up the Programs and Features menu. If you are prompted by the UAC (User Account Control), click Yes to grant admin access.
Accessing the Programs and Features menuInside the Programs and Features menu, scroll down through the list of installed applications and locate the entry associated with Blade and Soul. When you see it, right-click on it and choose Uninstall from the context menu.
Uninstalling the current version of Blade and SoulInside the uninstallation prompt, follow the on-screen prompts to complete the uninstallation, then restart your computer and wait for the next startup to complete.

If the same error is still occurring and you’re using a Razer device that uses Chroma functionality, move down to the next potential fix below.

Method 4: Starting the Razer Chroma SDK Service (if applicable)

As it turns out, if you’re using Razer peripherals, you can expect the game engine to trigger the 4049 error because the Chroma SDK service is disabled. The cause is unclear so far, but it seems like the NC launcher is somehow conflicting with certain peripheral drivers of Razer while the SDK is disabled.

Several affected users that were dealing with the same issues have finally managed to fix the error by starting the Razer Chroma SDK Service from the Services screen.

If this scenario looks like it could be applicable to your current situation, follow the instructions below to force start the service before re-launching Blade and Soul: