Hi Justo, I haven't played with that setting since we upgraded to v8, but my previous experience is that it would raise alerts for jobs that just weren't scheduled that day.
i.e. you would get alerts for:
5702 Jobname 'XXXXXXXX' not ordered (scheduling criteria are not met)
I'd certainly be curious to know if value of 1 will discern between jobs not scheduled and jobs in error.
If the value is 0, it throws error. We made it 2 and now we don't get that error message.