Yesterday it happened: I started a print job (approx. 45 min) and left my laptop on battery power. Usually it has enough battery to allow for 6+ h of operation.
But mid-print the computer went to sleep and therefore my print stalled. Of course I could adjust my energy settings to never sleep - but then I always forget to switch it back.
On MacOSX there are programmatic possibilities to prevent idle sleep - and most Mac apps do this (e.g. if you download a large file in Safari: Then Safari prevents idle sleep). You can read about it on Apple's Developer Portal:
https://developer.apple.com/library/mac ... index.html
It would be great if this could be added to Simplify3D!