Clients who upgrade CA SYSVIEW need a fall-back procedure if there are problems, and ask whether they can fall back to the previous release after the upgrade without having to perform an IPL.
Because the CA SYSVIEW modules GSVXSVC, GSVXAAST, and CAIXNM4$ reside in the LPA - as directed in the Installation Guide - they cannot be backed out without an IPL.
The three CA SYSVIEW modules GSVXSVC, GSVXAAST, and CAIXNM4$ are in fact downward compatible so you may keep the upgraded versions in the LPA while still falling back to the previous release of CA SYSVIEW. Therefore no IPL is necessary because of these modules.
Release: FAQSO.00200-11.6-SYSVIEW-Performance Management