Please be very specific about what you are trying to do. What inputs. What you want as outputs. Provide examples.  If your current code is not working explain how it is wrong.   Your example data step does not look right.  ALIAS2 should be a character variable, not a number.  DRAWN_DT_TM is not a number. You will need to either read it as a string or use an informat to convert it to a date.  Note that you should NOT be using only two digits for the year in your date strings.   If you want to convert 'Negative' to 0 and 'Positive' to 1 you should probably use an INFORMAT and not a format. ... View more