The Launchpad installation interface will automatically upgrade some software prerequisites. However, if you have a version of the prerequisite that is prior to one supported for upgrade by the current version of WebSphere Business Integration Server Express or Express Plus, you will have to manually upgrade the prerequisite before upgrading WebSphere Business Integration Server Express or Express Plus. (Refer to http://www.ibm.com/software/integration/wbiserverexpess for information about the supported versions of prerequisite software.) You can also choose to manually upgrade the prerequisite for any other reason. If you manually upgrade a prerequisite to a version that is supported by the current release (WebSphere Business Integration Server Express 4.4), the Launchpad will detect that you have a current version of that prerequisite when you perform the rest of the upgrade. Follow the upgrade instructions provided with a particular prerequisite if you manually upgrade it.
The following sections describe steps that must be done for any database and the upgrade scenarios for several software prerequisites. Make sure to follow the steps in Backing up the system before uninstalling or upgrading any software.
In preparing your WebSphere Business Integration Express system for an upgrade, you have two options for migrating the database: an in-place database migration and a without in-place database migration. An in-place database migration means re-using the old repository and letting WebSphere Business Integration Express do the upgrade of the repository during the first WebSphere Business Integration Express server startup. A without in-place database migration means upgrading with a brand new and empty repository database. Make sure to follow the special instructions in Backing up the system for in-place database migration.
If you uninstall a prior version of DB2, so that no DB2 version is present, the Launchpad will prompt you to install DB2 version 8.2 Express.
If you have DB2 version 8.1.5 or higher installed, the Launchpad will not prompt you to install a newer version of DB2. In this case, if you are on a version of DB2 prior to 8.2, and wish to upgrade to version DB2 8.2, you must upgrade it manually.
If you are using Microsoft SQL Server 2000 as your database, you must manually upgrade it according to the Microsoft SQL Server upgrade instructions. The Launchpad will not upgrade it automatically.
WebSphere Business Integration Server Express or Express Plus version 4.4 supports WebSphere Application Server Express version 6.0 and 5.1.1. Version 6.0 is the version that the Launchpad installs. You should uninstall any version of WebSphere Application Server prior to 5.1.1. If you have 5.1.1 already and wish to upgrade to 6.0, you must do so manually as the Launchpad will not prompt you to do so.
If you have an older version of IBM WebSphere MQ installed that was supported by a previous version of WebSphere Business Integration Express, Launchpad will do an automatic upgrade to the supported version. For example, if you have MQ 5.3 CSD 05 installed, Launchpad will do an automatic upgrade to CSD 06.
The Launchpad installs the appropriate version of the IBM JDK (version 1.4.2). It is not necessary to remove the previous version.