The SSAS 9.1.3 Service Pack 4 installer sets the Java option
-Dsas.jre=public on 32-bit Windows platforms, such as Windows XP, and
requires that you manually configure -Dsas.jre=public for 64-bit Windows
platforms.

The Dsas.JRE JAVA option is part of the JREOPTIONS in the SAS
configuration file. It helps direct SAS to the correct JAVA Virtual
Machine (JVM) to use. When -Dsas.jre is set to private--the path
provided by the -Dsas.jre.home option--is used as the Java home
directory to locate when the JVM gets loaded. When -Dsas.jre is set to
public--the Windows registry but not -Dsas.jre.home--is used to find the
location of the public JRE.

A side effect of using -Dsas.jre=public with SAS 9.1.3 service pack 4 on
Windows is that SAS always uses the JRE that was most recently installed
on the your machine. As a result, you might unintentionally change the
JRE that SAS uses due to -Dsas.jre=public being set.For example, if you
install JRE1.4.2.09 on a Windows machine where SAS is also installed,
-Dsas.jre=public causes your JRE 1.4.2_09 to be used by SAS. If you then
install a newer JRE, say 1.5.0, SAS then uses the new JRE instead of JRE
1.4.2_09, because the Windows registry was updated with the new JRE's
location when that JRE was installed.

Operating System and Release Information