In SAP BW 7.3, we have a new wizard to migrate entire data flow from 3.X to 7.X. Prior to BW 7.3 we have to migrate each object separately.
In 7.3 we can migrate entire data flow to 7.0
For Migration Process:
Step 1. RSA1-->From Info Provider Context menu-->Migrate Data Flow.
Step 2. Migration Project Name.
Step 3.Select 3.X Objects
Step 4.Save & Click On Migrate.
Step 5.Status of the Migration Project.
Step 6.Selection of Steps & Click on Migrate/Recover.
Step 7.Run Migration.
Step 8.Migration Complete : NO Error.
Migration Completed.
For Migration Recovery Process:
Step 1:
Step 2: Uncheck the Objects.
Step 3: Run the Recovery.
Recovery Process Completed.