What first comes to mind is that you haven't saved CLASS to disk in your CASLIB.
You can verify using CASUTIL LIST statement.
Data never sleeps
SAS Innovate 2025: Register Now
Registration is now open for SAS Innovate 2025 , our biggest and most exciting global event of the year! Join us in Orlando, FL, May 6-9. Sign up by Dec. 31 to get the 2024 rate of just $495. Register now!
How to Concatenate Values
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.