您必须为要回滚的所有节点启用以前版本的安装。

You must re-enable the previous version install for all nodes that are being rolled back.

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如果DB 2 udb安装是对以前DB 2版本的更新，那么需要手动安装jdk。

If the DB2 UDB installation is an update of a previous DB2 version, you need to install JDK manually.

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如果您已经安装该产品的较早的一个版本，那么在安装新的版本之前，必须先卸载以前的版本。

If you installed an earlier version of this product, you must uninstall it before installing this new version.

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