Px4 not booting

Hello all
I have created a module in px4 which subscribes to global position, I was able to run the compile it without errors and upload to fcu. But when i restarted fcu, it was not booting and giving the error sound or loooooong beep .! How is this booting issue related to a module subscribing to a topic?

Thanks in advance

If it works when your module is not present and doesn’t after then it is probably due to your module. It shouldn’t be due to “subscribing”. It might have crashed the vehicle due to a hard fault or similar. Have you tried it out in simulation. Or looked at the early boot behaviour?