This task schedules a long running background process that attempts to ensure that all instances of Java objects stored inside BLOBs and SMALLBLOBs in your database are evolved to their current class schema versions. Since this evolution process is long running, it is scheduled to run in schedule queues during overnight hours and may not complete for several days. To communicate any issues it encounters during the evolution process, it sends emails to the administrative user. Confirm that your target installation's email server is configured properly and the Administrator has a valid email address. If this step succeeds, your system is upgraded. To view the log, navigate to: <Windchill>/logs/Upgrade-BackgroundBlobRewriter.log. To turn on the logging for the blob rewriter, add the following line to <Windchill>/codebase/WEB-INF/log4jMethodServer.properties:

This task removes the source configuration node (For example: “dc=com” or “cn=configuration”) from the source LDAP baseDN present on the taget LDAP server.

This task is performed only for Oracle database. This is the final upgrade step that collects and recompiles invalid database objects.

This task removes entries from the package content synchronization processing queue (WPSyncQueue). It also removes data from tables which store temporary information used for content synchronization of CAD documents when exported via packages and content synchronization is enabled. This data is removed to avoid upgrading it, as it has no life span beyond an active package export process.