If your system is misconfigured or the endpoint is unreachable, the data load will fail.

Are you encountering this error during a or while trying to update an existing catalog? Connect Configuration - Home | TecCom Wiki - TecAlliance

In essence, the software is telling you: “I tried to load the catalog using the instructions in my settings file, but those instructions are either pointing to the wrong place, the data is corrupted, or I don’t have permission to read it.”

Look for lines starting with DataPath= or DataBasePath= . Ensure these paths match the actual location of your data files on your hard drive.

To resolve the "Loading data failed. Check the configuration file" error in TecDoc (likely the TecDoc Catalog or the new TecDoc ONE

TecDOC New requires outbound internet access to specific domains (usually api.tecdoc.net or similar). If your workshop recently changed internet providers, installed a new firewall, or updated a proxy server, the application might be blocked. The configuration file might still be perfect, but the connection fails. The software interprets this as a configuration issue because the file tells it where to connect, and it cannot reach that address.

: Sometimes the supplier's system is temporarily offline for maintenance. Note that regular IDP downtimes in 2026