SAS Analytics 13.1 is shipping as part of a maintenance release for SAS 9.4. This release combination reflects the recent SAS release strategy, in which technology releases come first and analytics releases follow a short time afterward. SAS Analytics 13.1 is meant to work with SAS 9.4. So far, I haven’t come upon any stories of attempting to use 13.1 procedures in SAS 9.3. If history is a guide, that would work to some extent, but with so few incompatibilities in SAS 9.4, it would surely be simpler to make the jump to SAS 9.4.