I attempted a test run on the Autel Robotics x star this morning and could not start the motors. It kept saying "magnetic interference" no matter where in the yard I went. No over head wires anywhere, all power and telephone lines are buried. I was at least 50 feet or more away from steel buildings. My flip cell phone was turned off in my pocket.  All I can think is the keys in my pocket or zippers on the heavy winter clothes I had to wear to survive even a few minutes out in the 0 degree temps. After about ten minutes I had to abort the mission due to loss of fingertip feelings. Tried it in the house without the props on and it started fine. ?????