CodeBuster BUST failing

I have an error on a BUST command, nothing happen : (tick ~200, I’m the IDE code).

Two of my buster try to BUST for lots of rounds but nothing happen (not showing in replay log since it doesn"t show the IDE commands, only the contestant ones).
Is this a contest bug ?

You’re too close. Please repect the security distance to bust a ghost (900).

Indeed, I forgot this rules.
I’ll try to no cross the flux.
Thank you !