[AIX HP-UX Linux Solaris Windows]This topic applies only on the i5/OS operating system.

Logic used by the Update Installer for uninstalling

The Update Installer uses logical procedures when it uninstalls maintenance. These procedures are covered in this topic.

The uninstall command works similar to the stack logic in computer science. In order to uninstall a fix pack, the fix pack needs to be uninstalled in the reverse order that it was installed. The last fix pack installed needs to be the first one uninstalled.

If maintenance packages A, B, C, and D have been installed in that sequence, the packages must be uninstalled in reverse order, such as D, C, B, A. This is true even if these applications are made up of fix packs, interim fixes and feature packs.

In the following example, the list of packages have been installed in this sequence.
1. WebSphere Application Server 6.1 GM
2. WebSphere Application Server fix pack 6106
3. WebSphere Application Server fix pack 61016
4. WebSphere Application Server Feature Pack for Web Services depends on WAS FP 6103)
Each maintenance package needs to be uninstalled in the reverse order from which it was installed. In the example above, the enabling interim fix is the dependency that prevents 6.1.0.16 from being uninstalled. By uninstalling Feature Pack for Web Services, you release this dependency and are able to uninstall WebSphere Application Server fix pack 6.1.0.16. After the Feature Pack for Web Services is uninstalled, WebSphere Application Server fix pack 6.1.0.16 can be uninstalled.
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Last updated: Feb 19, 2011 5:25:36 AM CST
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