Today after almost 10 successful flys with the Alta I take it to production... Something easy and no so stressing, like taking pictures for a bulging catalog... Movi5 & Sony A7SII Connect the Movi, the Alta... And as always the message booting... But these time the message never go off... And in the iPhone app same thing... I try to connect & disconnect it several times but nothing... After about an hour I give up and return to my office... In the way I look at a spot to fly and try again... At the first try everything goes with no problem at all... I think the problem was some electricity lines that was at 20 meters where Inwas to take off... But no compass or GPS errors just it didn't boot... In the same place I fly my S900 with A2 with no problems (luck that I have it with me at that time) Any ideas? Interference maybe?