USB upload stops at 20 percent
When uploading a project to a controller, the upload may sometimes stop at 20% to then fail.
Workaround
1. Upload to the control system via an external USB hub instead of directly from the USB port of the laptop.
2. If it’s not possible to use an external USB hub, reboot the controller and try again.
Please make sure to remove both the power source of the controller as well as the USB connection, since the devices can be USB bus powered.