Overview

Preparation for a possible fallback starts during the upgrade process and continues during the first week or two of production in the new environment after the migration (the transition period). The following guidelines will help you during the transition period:

• Avoid updating or making changes to exits, rules, missions or jobs.
• Keep the previous installation files on disk and cataloged during the transition period.
• Keep a log of changes made during the upgrade and the transition period.

If you did the above, falling back to your previous version will be considerably easier.