During migration, the program updates project or drawing-level data. For example, it changes point parameter names to support end-coded valves, or adds To/From properties for pipe line segments.
Migration can be time-intensive, depending on how large a project is or how many drawings are associated with the project. Once the migration is complete, you can work on the project and its drawings.
When you open a project created in an earlier version, the Project Migration wizard starts. It displays the Project Migration Launch dialog box. To restore the project in an earlier version, copy the files from backup into the migrated project folder.
Configuration: Migrating Projects Specs Catalogs.pdf (pdf).