This article describes those post-install tasks you might
need to complete before using SMP/E to restore to the previous accepted
service level.
If you install service and then find that, for
some reason or another, you need to revert to a previous release,
you typically need only to use SMP/E to restore to the previous accepted
service level. However, some service releases contain defects that
are incompatible with previous releases of WebSphere Application Server
for z/OS.
Note: You will know if you are applying a service level that
contains backward-incompatible defects if you receive message BBOO0286A
(WTOR message 286) when the post installer applies the service. The
console will prompt you to accept the backward-incompatible change.
If you decide not to accept the change, you must either use SMP/E
to roll back to the previous level or follow the post-install backout
plans described in
Completing post-installation tasks after using SMP/E to apply a new service level.
When you restore
to the previous accepted service release, you need to first "back
off" any post-install actions containing backwards-incompatible defects
that were applied during that service before using SMP/E to restore
to the previous accepted service level. This article describes the
steps necessary to run the
backoutPTF.sh shell
script, which is located in your bin directory (WAS_HOME/bin, where
WAS_HOME is the absolute path of the WebSphere runtime home directory)
and which handles the backing out of applied post-install service
for you.