Cannot upgrade firmware to Copter 4.6.3

Hello, I’m using a Pixhawk 2.4.8 and currently I have Pixhawk1-bdshot on it but I just cannot upgrade to 4.6.3. I’ve tried downloading the .apj and flash locally and also tried the beta versions of both current and legacy firmwares but none work. Sometimes I get a “Lost communication with board” or “No heartbeats received” or some sort of “Error” in communicating with the board.

I have also tried uploading Pixhawk1, fmuv2 and fmuv3 with the same results

Try QgroundControl to flash Arducopter. You could consider a better flight controller.

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Okay, this worked, thanks