Apparent QNX 6.2.1 Crash

I’m running an application that kills some processes (I know, I should have
them gracefully exit), then spawns another process that displays a menu on
the console and then blocks on a read from standard input (keyboard). Once
in a while (infrequently), I see the following message and my SBC locks up.
The only thing I can do is cycle power:

Shutdown [0,0] S/C/F=11/1/11 C/D=f00129b6/f0046ec0 state(c0)= now lock
[0] PID-TID=75006915-1? P/T FL=83c97e00/80000000

Does anyone know the origin of this message and what it might mean?

Thanks in advance,

Eric Franz
Ricanz Corporation