Post code and the program log.
If you test with smaller data sets such that only 2 pages are created for the first two groups do you still have a similar behavior for a the third? If so post dummy data that will generate the type of output you describe with small enough data we can examine. (I really am not interested in trying to wade through 700+ pages).
Learn the difference between classical and Bayesian statistical approaches and see a few PROC examples to perform Bayesian analysis in this video.
Find more tutorials on the SAS Users YouTube channel.