Hi @acordes The easiest way to see if I have solved a problem is to use the SITE: in your favorite search engine. For example, type the following into a search engine: concatenate string delimiter site:blogs.sas.com/content/iml You will find "Tips for concatenating strings in SAS/IML,"  which describes this problem and provides a solution. ... View more

PaigeMiller and Ballardw, thanks a million for the suggestions!! I have tried both solutions.  Ballardw, you are right. I should think about and work on a better grouping, so that the same dataset can be used for different analysis.  That's so much to learn and really thanks alot for your help!  Have a good day! ... View more