Fix Apex Legends Engine Error: FS_CheckAsyncRequest (2025)

Updated: 11/29/2025

You are in the final ring, 2 squads left, your shields are full... and then the game freezes. A white box pops up: Engine Error: FS_CheckAsyncRequest returned error for model.... It is heartbreaking. This specific error is unique to the Source Engine (which Apex runs on). It essentially means the game tried to load a texture or model (like a gun skin or map rock) from your hard drive, but the file was unreadable or 'out of sync' with the server.

Table of Contents

The Root Cause: Asset Desynchronization

Unlike generic crashes, this error points directly to your storage drive. It happens when:

  • Corrupted Updates: A recent patch didn't install 100% correctly.
  • Texture Streaming: Your GPU is trying to pull textures faster than your hard drive can read them.
  • Drive Rot: A specific sector on your SSD/HDD is failing.

Method 1: Repair Game Files (The Essential Fix)

Before messing with drivers, force the launcher to scan every single asset file. This fixes 95% of 'FS' (File System) errors.

If on Steam:

Right-click Apex Legends in your Library. Go to Properties > Installed Files and click Verify integrity of game files.

If on EA App:

Go to your Collection, click the three dots on the Apex card, and select Repair.

Warning: This process can take 10-20 minutes. Do not cancel it once it starts, or you might corrupt the entire installation.

Method 2: Lower Texture Streaming Budget

If your files are fine, your GPU VRAM might be choking. The 'Texture Streaming Budget' setting controls how much memory Apex reserves for textures.

Step 1: Open Video Settings

Launch the game and go to Settings > Video.

Step 2: Adjust Budget

Find Texture Streaming Budget. If it is set to 'Insane' (8GB) or 'High', lower it to Medium (4GB) or even Low (2-3GB).

This effectively tells the engine: 'Don't try to load super-high-res skins instantly.' It stops the engine from panicking when it can't find a texture fast enough.

Method 3: The 'Saved Games' Wipe

Sometimes, the local configuration file that tells the game how to load assets is corrupt.

Step 1: Navigate to Profile

Open File Explorer and paste this path:

%userprofile%\Saved Games\Respawn\Apex\local

Step 2: Delete Assets

Delete the files inside (usually settings.cfg and videoconfig.txt). When you restart Apex, it will generate fresh, clean config files.