Here is a comprehensive guide to troubleshooting and resolving this configuration error. 1. Verify the MariaDB or MySQL Service

Antivirus programs often flag the "crack" or "emulator" files within a repack as a False Positive. This can lead to the deletion of the very .dll files needed to read the configuration.

Add the entire TecDoc installation folder to your Antivirus Exclusion/Whitelist move.

The "Loading Data Failed: Check the Configuration File" error is a common headache for automotive professionals and enthusiasts using TecDoc repacks. This error typically triggers during the initial launch or after a database update, effectively locking you out of the catalog.

Ensure the host is set to 127.0.0.1 or localhost . 3. Adjust Folder Permissions

Look for TECDOC_CD.INI , config.ini , or db_config.xml .