Happens to my 2013 ALL THE TIME. Crashed on me 3-4x a day, sure enough.. go back and look... and its turned itself back off... Has to be a fix for this somewhere.
Don't worry it's happened in every version for the last 8 to ten years possibly more, the only fix they seem to have is the usual cop out when IT don't know how to fix it--- blame the user !!! Happens to all our machines here, laptops and PC's, 32 bit and 64 bit, XP, Vista and windows 7 I'm guessing it would happen on windows 8 (or Vista 8 as we like to refer to it) but we are not using w8 on any machines here.
Doesn't happen to all the machines at the same time and can't figure out why it does it. One machine may do it 3 or 4 times in 1 day then be fine for a month or 2. Some times 3 or 4 machines will do it together.
Have experimented with it..... make sure it is on.. lock screen and go to lunch.., come back and sometimes it has turned off during lunch,I check the drawings that I left open and they have autosaved during the lunch break but then it has stopped working randomly during that hour.
Same happens when I experiment with it afterwork. Check that it is on, leave some files open lock machine and go home. I'm last to leave at night (just incase someone tries to say somebody else knows my password or similar cop out). some mornings when I log back in it has turned off overnight. Usually it is spaced out far enough between turning it's self off to make you give up checking it 😉
i added the SAVETIME command to my startup routine. now when autocad starts up, it sets the autosaves to 5 minutes (so even if it crashes and turns it off, when I reboot, AutoCAD turns it back on).
my autosave directory is starting to fill up. 🙂
Hah!...was happy to see your response finally at the end of this thread. I have also found this to be a frequent problem over the years, and no good reason for Autosave to toggle off as it does. It is very useful when working, but I think a lot of users probably stopped counting on it a long time ago. Time to fix it!