Are you running -dologs as a launch arg? You can also do this by opening the Vanilla launcher, going to parameters then checking the "Logging" box under the "Advanced" section.
You shouldn't need this, but if it's not generating a log upon crashing you might need -dologs or the checkbox
(They do the same thing, just 2 different ways of enabling)
Also - check here - It's possible you might have missed it....if the crash reporter dialog never opened up after you kill it from task manager
Press Win + R
A "Run" window will pop up
Type %localappdata% and hit enter
A file browser window will open
Open the folder named "DayZ" or "DayZ Exp" depending on whether you are expierencing issues on Experimental or Release
Attach any files named "crash_2026datedatetimetime.log" <-- The date/time will be in the file name so you can be sure you are grabbing the latest one(s)
^^^ Just incase I would also attatch your latest DayZ_x64datedatetimetime.RPT
Make sure to use -dologs/logging checkbox. this will log everything going on in the game right up until you close it.