This has happened twice to me when I am trying to create dark frames. The power is from an outlet. The zwo 224 camera was attached this time. ASIAIR was turned on and heard the beep. Using the IPAD that has worked fine for taking lights, I connected to the ASIAIR wifi. Opened the ASIAIR app and that's when I get the message and it disappears with the result the app is frozen. Twice I have had to delete the app and reload.
