Hello, I have a very strange behaviour in a data step that looks like this: data one (keep= a b x y z) two (keep= a b z t) three (keep = a b c); set input_data; /* This data set contains all variables above */ select (a); /* A is an integer variable */ when (1) do; b=2; output one; end; when (2) do; b=3; output two; end; otherwise b=1; end; put "a:" a "b:" b; output three; run; The values of a and b displayed in the log file via "put" are ok, but these values are somehow not written in the dataset three, which seems to keep the original values from the input_data table. I am afraid to be missing something very basic here, but I really cannot put the finger on it. Any help would be greatly appreciated. Thanks! Andrés
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