You could certainly add a sleep, but that might not necessarily prevent the problem. It would almost have to be a sync, which you would not want to do often.
Perhaps this is an effect of memory mapping, where the OS is handling it well. Try setting AFNI_NOMMAP to YES and see if that tends to prevent it.
How often does this happen, or is it just once in many months?
-rick
Thanks @rickr , I’ll try setting AFNI_NOMMAP to yes.
I’ve only encountered this issue very rarely, but I’ve noticed that it tends to occur more often in one of my preprocessing scripts where I run 3dBlurInMask followed by 3dcalc immediately.
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