Why is SuperDuper not running at scheduled time?

[Chris_Porter]

Originally Posted by dnanian

Because if it's more than one minute, your mac will sometimes go to sleep before we can start, regardless of your sleep setting... as you're seeing.

And this is a known random occurance, that hasn't happened to me before? I looked through the userguide, it gave no reason to start up one minute before. Perhaps this issue should be addressed. I know that after startup, the computer's not scheduled to sleep for 30 minutes, by settings in the Energy Saver. I'm unclear--is there a known fault with Energy Saver?

Are you sure there isn't some log that describes what is going on after startup so I can see why Friday's backup did not behave like Wednesday's backup? I'm really skeptical that the issue of going back to sleep is the fault, since it's not behaved that way in the past.