Do not reinstall the software yet. Follow this ladder of troubleshooting.
Once you have fixed the error, implement these seven best practices to ensure it never returns. loading data failed check the configuration file tecdoc best
If you have validated the file path, confirmed the XML syntax is perfect, and disabled the firewall, but the error persists, provide your support technician with these three things: Do not reinstall the software yet
Warning: Do not run the "Repair Installation" from the Windows Control Panel unless you have your original license key. Repair often resets the configuration file to default, breaking your custom database paths. Warning: Do not run the "Repair Installation" from
If you manually edit the configuration file (e.g., to add a new vehicle segment) and introduce a missing closing tag, an unescaped ampersand (&), or a duplicate attribute, the XML parser throws a silent error. TecDoc reads this as "configuration file malformed."
Signature symptom: The error appears even though no network or database changes were made.