Hi all,   I'm not sure if there is any solution that i might have missed out, but just looking for some help.   I am trying to make my column variables dynamic. The code is as follows: %Let len = 7; %Let col = TEST; %Let colano = %col%str(_ANONMY); Data help; Set Work.dataset; &colano = cats(of new1 - new&len) Run;   This line: &colano = cats(of new1 - new&len) returns me an error message of ERROR 180-322: Statement is not valid or it is used out of proper order.   Is there anyway i can work around it? There are other parts of the code that i would require to use &col elsewhere, which explains why i need 2 lines of macro to separately define them. (I opened OPTIONS SYMBOLGEN and the macro &len seems to be working fine.)   Thanks for your time to those who are reading this! ... View more