Why and when to perform this task
This topic describes those post-install tasks you may 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 to not 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 Post-install tasks to complete 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 topic 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 run-time home directory) and which handles for you the backing out of applied post-install service.Steps for this task
Example: This is an example of the command used to run the backoutPTF.sh shell script, run from the shell by a user with the proper authority. It prepares the WebSphere run-time home directory to run at service level "W500104."
backoutPTF.sh W500104
Note:
Results
You know you are done when you are successfully back on the desired service level.
What to do next
The following is a list of common errors that might occur when you use backoutPTF.sh to back out of service. The output goes right to stdout (on the shell from where the applyPTF.sh script was run).