Race Engineer Is Not Detecting My LMU Sessions

If GO Fast Race Engineer is not detecting your Le Mans Ultimate (LMU) session, follow this step-by-step guide to verify your configuration and ensure everything is installed correctly.

These checks solve 99% of detection issues, especially on new installations or after game updates.

1. Confirm Your LMU Install Path in GO Fast

Before starting, close LMU completely.

1. Open the GO Fast.
2. Go to Settings → Game Paths → LMU.

3. Verify that the path ends with:

   C:\Program Files (x86)\Steam\steamapps\common\Le Mans Ultimate\UserData\player\Settings

   If this path is incorrect, update it manually.
   If the path is correct, click Refresh next to the field.

Why this matters: GO Fast reads session data and plugin settings from this exact folder. Any deviation, even a missing "player" folder, prevents detection.

2. Verify Required LMU Files and Folders

These files allow GO Fast to communicate with LMU. Missing or misplaced files will prevent session detection.

a. Check LMU Plugins Folder

Navigate to:

Le Mans Ultimate\Plugins

Confirm that the file GOFastMemoryMap.dll is present.

• If this file is missing, reinstall the LMU plugin via GO Fast settings (Step 1).

b. Check Plugin Variables File

Navigate to:

Le Mans Ultimate\UserData\player

Verify that CustomPluginVariables.json exists and that it matches below settings.

This file stores LMU plugin activation settings, without it, LMU will not send telemetry to GO Fast.

3. Install All Runtime Dependencies

Navigate to:

Le Mans Ultimate\Support\Runtimes

Run every installer in that folder:

• Visual C++ Redistributables
• .NET runtimes
• Any additional packages included with LMU

Missing runtimes are one of the most common causes of plugins failing to load.

If the Issue Still Happens

Please open a support ticket via Discord or our Help Center and include:

• A screenshot of your LMU path in GO Fast
• Your LMU Plugins folder
• Your CustomPluginVariables.json file

This helps us diagnose your configuration quickly.

Need help?

If you are still experiencing issues, check the Troubleshooting section for common solutions. If you cannot find what you are looking for, open a support ticket and our team will help you out.