I have 3x CDJ3000s and a DJM900srt this happens using USB or SD.
If I load a track and then immediately hit a hot cue it goes into error 302e. If I reload the track and do the same thing it will work just fine. This happens quite frequently and across all 3 players whether I have them linked or the only item in the room. Thank you for help on this as it has become quite annoying