See What's New for new software features
that are not functional in previous releases.
For example, SAS continually releases new formats and informats, which are not supported
in previous releases. Another example is catalog entries, whose behavior can change in a new release.
These are two examples of new features that, if applied in the current release, can make
a data set unreadable in a previous release.
In 64-bit SAS, you can create a data set with
greater than 231-1 (about 2 billion) observations.
A data set with more than 2 billion observations is unusable by the BASE engine in