HP-UX Virtual Partitions Administrator's Guide (includes A.05.02)

Installing, Updating, or Removing vPars and Upgrading Servers with vPars
Updating from vPars (A.02.xx or A.03.xx) to A.03.xx
Chapter 4
101
You must install the new vPars bundle on each virtual partition before putting the virtual partitions
back into production. Running a mix of older and newer vPars versions within a group of virtual
partitions is not supported.