The Server Log Masterclass

The output_log.txt file is the server administrator's best friend. This guide teaches you how to decipher the raw data to find and fix crashes, mod conflicts, and connection issues.

Where to Find Logs

By default, logs are located in the 7DaysToDie_Data folder. Look for output_log[timestamp].txt.

Common Error Patterns

• "NullReferenceException": Often caused by a mod trying to access an item ID that doesn't exist or was removed.
• "Eos Registration Failed": Your server ports (26900-26905) are likely blocked, preventing Crossplay authentication.
• "Yellow Text (Warnings)": Usually related to missing block textures or minor XML typos. Most are harmless unless they flood the log.

Enabling Debug Mode

If you are experiencing a persistent crash, add -debugmenu to your startup parameters to get more verbose logging on chunk loading errors.