Thanks all! Proc means definitely fails when it runs out of memory. Other way to use P2 method which approximates the stats. However, I wanted to use P2 when it runs out of memory otherwise OS method. Another challenge was to guess when the proc means would fail (My process is completely automated). I decided to use proc stdsize just for quantile calculations, as this proc is smart enough to switch the method to P2 when there is no enough memory to estimate quantiles. But I had to use proc means for other stats (Mean, STD Max etc) and combine the results. Any comments? Thanks, JK
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