How Can I Fix Wuthering Waves Error Line 677 Quickly?

The “Fatal Error Line 677” in Wuthering Waves usually pops up during launch, crashing the Unreal Engine 4 (UE4) client and closing the game.

In plain terms, the GPU stopped responding, or the game couldn’t access a needed map resource. If you’ve hit this error, you’re not alone. Players on both AMD and NVIDIA GPUs report similar crashes after 2.3.

What Causes Fatal Error Line 677?

• GPU driver hiccups: Recent driver updates, especially on NVIDIA with raytracing enabled, can break compatibility with UE4 .
• DirectX version mismatch: Running the game in DX12 can sometimes trigger device removal errors; DirectX 11 can be more stable .
• Launcher vs. EXE: Launching the game via Epic Games or Steam without axe-specific settings can cause odd crashes .
• Corrupt files: Game assets may be missing or corrupted, especially after a patch.
• Windows security flags: Control Flow Guard or incompatible Visual C++ run times can block game resources from loading .

How to Fix Fatal Error Line 677?

Try these solutions in order until one works for you :

1. Launch via the .exe file

Many users report that bypassing the launcher helps:

• Go to your Wuthering Waves folder (via Epic Games/Steam).
• Locate and run exeor Client-Win64-Shipping.exe.
• This simple change often avoids fatal errors .

2. Force DirectX 11 mode

DirectX 11 is often more stable than DX12:

• If using Steam, add the game as a “Non-Steam game.”
• Right-click, Properties, Launch Options, type: -dx11
• Launch the game via Steam to test.

Some RX 7600 users report that this method may reduce performance despite fixing crashes .

3. Update GPU drivers

Always ensure your graphics drivers are up to date:

• NVIDIA: Use GeForce Experience or official driver updates.
• AMD: Use Radeon Software to get the latest stable drivers.
  New drivers often fix device removal issues .

4. Update DirectX and Visual C++

Download the latest Direct Redistributor from Microsoft . Install or repair Microsoft Visual C++ Redistribution to fix low-level runtime errors .

5. Verify and repair game files

Epic and Steam launchers offer built-in file verification:

• Epic: Open Library, next to Wuthering Waves, Manage,
• Wuthering Waves Launcher: Click the wrench icon to repair the game .

6. Disable Full Screen Optimizations

Some users found that disabling Windows full-screen optimizations helps:

• Right click on the game EXE, Properties, Compatibility tab, check Disable full screen optimizations.

7. Turn off Control Flow Guard (Windows)

CFG might interfere with launching the game:

• Go to Windows Security, App & Browser Control, Exploit Protection Settings, and turn off CFG for the game.
• Restart your PC and try launching again .

8. Disable Ray tracing

If crashing occurs only with ray tracing on:

• Turn off RT in the game’s video settings or graphics control panel.
• Alternatively, use the -dx11 launch option to bypass DX12 (which RT uses).

9. Run as Administrator

Right-click the EXE: Run as administrator. This ensures the game has full access to needed system files.