How can I view the residual table generated? ... View more

I had a siimilar issue recently for an unrelated project.  A little googling at the time turned up a few things to check...this doesn't appear to be a SAS-only concern.   Your Host OS is 64-bits (obviously is) Check that Intel Virtualization Technology and VT-d are both enabled in the BIOS. Ensure that he Hyper-V platform is disabled in your Windows Feature list.   If these don't help, you may want to check the Virtualbox forums to see if others fixed it.   =G= ... View more

Ah, I like a problem with a simple solution. Sort the data by TREE prior to invoking the NLMIXED procedure. You will then get the results reported by Serroyen et al. Below is a note from the NLMIXED RANDOM statement documentation which discusses this requirement: NOTE: The input data set must be clustered according to the SUBJECT= variable. One easy way to accomplish this is to sort your data by the SUBJECT= variable prior to calling PROC NLMIXED. PROC NLMIXED does not sort the input data set for you; rather, it processes the data sequentially and considers an observation to be from a new subject whenever the value of its SUBJECT= changes from the previous observation. ... View more

There is also a third parameter to the compress function that can remove all characters of a certain type. For example, 'p' removes all punctuation characters. data test; x = "''x''"; y = '""y""'; z = cats(x, y); w = compress(z,,'p'); run; proc print data=test; run; ... View more