, the error might be due to temporary server downtime or misconfigured endpoints. HCLSoftware Technical Support

Press Windows Key + R , type regedit , and hit to open the Registry Editor.

: In some versions, an automatic update check can trigger a loading failure if it cannot reach the server. Go to User Settings > Update Settings and set them to if you can access the menu. Common Root Causes Invalid XML/Configuration Data

If you installed TecDoc on drive D:\ but the registry says C:\ , change it manually to match your current setup. 4. Adjust Administrative Permissions and Ownership