Please paste your log output or provide the URL to your log file below
(Log files can be found on the root of your USB drive or in %localappdata%\CyanLabs\Syn3Updater\Logs)
This has been reported many times by only a small portion of users and cannot be reproduced for troubleshooting. As the error says, the server (Ford’s) is closing the connection.
This is what you could do:
Keep trying until it succeeds
Try a different computer
Try a different network
Configure Syn3Updater to only use a single download connection instead of 8
Manually download the files via a browser and save them into the Syn3Updater download folder and re run the process: Syn3Updater will find the files locally and validate them without re-downloading and later create the USB drive.