Hi @LaurenMeta ,   Having your code in text format makes it very difficult to follow or even read in some cases.  Could you repost, with your code in the "Insert SAS code" box?  The icon that looks like  is what will trigger that.  The </> icon will also work.  If you have issues with PROC GLIMMIX, please also show your complete log file, so that we can trace any errors back to the source. SteveDenham ... View more