Preparing an RNDIS Direct Hotspot

Please ensure you have the following when preparing an RNDIS Direct hotspot

Your hosting device (the one running the TetherFuseNet application) is physically connected to your other device via a USB data-cable.
Your hosting device has enabled USB Tethering from the Android system settings.
You have selected a valid port number between 1025 and 65000.

NOTE: While using the RNDIS Hotspot, please do not disconnect the USB data cable.

     I have no idea what will happen if you do - but I know for sure that TetherFuseNet will not work.