The programs and applications that you have written, which run without errors on the source release, may contain syntax or runtime errors after the update. These may be caused by additional developments of the ABAP Workbench, changes to the ABAP syntax, or stronger syntax checks when you update from one release of SAP Basis, SAP Web AS, or SAP NetWeaver AS to the next one. You can solve these problems by adjusting your programs to the new version of the ABAP Workbench.

We also recommend to check the customer developments, which will be replaced by SAP standard during the update, if they are still necessary.