Thank you @ballardw . Will follow code formatting going forward. To ask a bit more here: 1. isn't array med of size 12 being initialised with mth_01 to mth_12. And later one med{i} which is mth_01 to mth_12 being initialized with value 0. I'm confused because I can see in sample report out of the whole code, columns are being derived. So was confused with 0 intialization. 2. A statement like : (this piece of code is right above if last.individual_id line) < if (med_allowed ne 0) then med{diff+1} = med_allowed; medal1 = sum(medal1,med_allowed); /> to me it looks like med{diff+1} is initialised with med_allowed value, but doesn't seem being used. I can't understand if its author's way of code or its SAS way of doing. If I'm right, can you please confirm If i can read it as < if (med_allowed ne 0) ; medal1 = sum(medal1,med_allowed); /> P.S: This is very old code and can't reach to author. Thus asking for help here. thank you. I have used SAS documentation to understand concepts overallan and they have been helpful. ... View more