When using the Update Installer in WebSphere Application
Version 5.0 and 5.1, be aware that if an uninstall operation is started,
you cannot perform another Update Installer installation until that
uninstall is successful.
For example, if you apply a fix pack and encounter errors, you can
uninstall that fix pack, but you must complete the uninstall without
errors before applying any more fixes, otherwise your WebSphere
Application Server installation will be corrupted and require that you
completely uninstall and reinstall WebSphere Application Server.
If the installation fails and you attempt to reinstall that same fix
pack, the component that failed to install initially may be skipped during
your subsequent attempt to reinstall.
Even if your installation to have succeeded, you may not be able to
remove that fix or fix pack. In the case of a cumulative fix that would
need to be uninstalled before a higher fix pack can be installed, the
uninstall might fail without the ability to uninstall it.
This is caused by attempting to reinstall after the failed uninstall
process.
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