Library /sys$common/syshlp/helplib.hlb
PRODUCT, UNDO, PATCH, Qualifiers, /NEWEST
 *Conan The Librarian 

       /NEWEST=count

    Selects the most recently created patch recovery data sets. For
    example, if you specify /NEWEST=3, the PRODUCT UNDO PATCH command
    uninstalls patches using data from the three newest recovery data
    sets. If you do not specify a number with this qualifier, the
    default value is 1.
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