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Past upgrades have no doubt gotten you used to the idea that ABAP code is always 100 percent downward compatible, so that after an upgrade to a newer version of SAP your custom code keeps working without having to be changed. This is not the case when moving to S/4HANA, as it is in effect a totally new product, so you are not doing an upgrade but rather a re-implementation. In this chapter, you will learn how to ensure your custom code is of high enough quality to keep working after a move to S/4HANA. |
