PREVIEW only? (install operation will NOT occur)
Indicates whether you want to preview the installation of the 
selected software products and updates. A preview identifies 
requirements for the software installation to be successful.
YES instructs the system to display information on space 
requirements, whether the software passed a preinstallation check,
and a list of software products and updates that will be installed.
This information may also contain a listing of software products and
updates that cannot be installed because of requisite problems. The 
default for this option is NO.
By also selecting YES to the "DETAILED output?" option, the listing
of the software and updates will be displayed in install order.
NO instructs the system to perform the installation.