Hello, hello, I am new to sas and if I'm honest a little bewildered. I am currently trying to carry out a series of t tests for a repeated measures design, but it's saying that one of my variables doesn't exist? I'm using composite variables which I made earlier so perhaps thats were the issue lies?   I have looked for resources but I cant seem to find anything that will help me. Thank you for your time 🙂 ... View more