TecDoc is strictly licensed. If your subscription has expired or the dongle/license key is not recognized, the system may fail to load data.
No line number. No column mismatch. Just that vague message.
If the error persists after following this guide, provide the following to TecDoc support or your software vendor:
How to Fix "Loading Data Failed: Check the Configuration File" in TecDoc
: The application may lack the necessary administrator rights to read the configuration file or the database files.