If values for the variables in an input statement are split accross iterations of the data step the @@ symbol should appear at the end of the input statement to hold the data card for the next iteration of the data step and prevent data from being lost. Typically this situation occurs when there is either more or less data on each data card than is required for the input statement(s) in the data step.
Copyright © 1997 by Jerry Alan Veeh. All rights reserved.