Migration from 3.x to 7.0 - Approach

Hello -
Want to get a confirmation:
1/ If there is no migration from 3.x to 7.0
   - Cannot use Transformations
   - Cannot us DTP
2/ If there is a migration, then
- Have to reconstruct Datasource to Target Mapping Entirely
    (e.g., 0MATERIAL InfoObjects to 0MATERIAL_ATTR Datasource)
     The R/3 field mapping to InfoObjects has to be completely redone, since there
     is no proposal
- What do most of the experienced folks do to ease the effort of reconstruction
3/ I understand that if there is no migration, cannot use RDA , remote activation of DS, error stack, and the items mentioned in point # 1, but these are nic to haves. Do you see a real advantage to the migration
Thanks - and points will be awarded
- abhi

Hello:
I think you are referring to DataSource migration?
1 - You CAN use transformations and you CAN use DTP without migrating the DataSource, this is known as an "emulated DataSource".
2 - NO "reconstruction" is required. Keep in mind that if you migrate a DataSource to 7.0 form, that transfer rules are deleted. Therefore, before DataSource migration you should use the "create transformation" functionality from existing transfer rules. This functionality will generate a proposed transformation, including proposed ABAP OO routines where ABAP routines had existed previously.
3 - you can use error stack with an emulated DataSource. In general, migrating to the new DataSource form ensures you have completely moved to the new dataflow concept in a consistent manner. The new dataflow has good advantages from a performance standpoint, in that you can parallelize the data load. The error stack is a big advantage from a data quality standpoint. The overall approach using DTP's is a step forward in that the dataflow occurs in a more transparent manner in process chains and monitoring.
Thanks for any points you choose to assign.
Best Regards -
Ron Silberstein
SAP

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