The system automatically recognizes during upgrade if modification adjustment is necessary. You are then prompted to perform the modification adjustment.

You can run a preliminary analysis of necessary adjustments that shows you if and in which phase adjustments will be necessary before an upgrade is run. As of Release 3.0, those objects needing adjustment can already be displayed in transaction SPDD after you run the analysis. If you have a release older than 3.0, the UMODPROT.<SID> file located in the upgrade directory ‘log’ contains a list of the objects you need to adjust.

An adjustment is required for all objects that were both modified by you and delivered by SAP. If you have not made any or only very few ABAP Dictionary changes, you are generally not prompted to perform an ABAP Dictionary adjustment.

You must perform one of the following actions for all objects presented for adjustment:

• Retain modification:
  Maintain the change with the appropriate maintenance transaction.

• Cancel modification:
  Choose Return to SAP standard.

If you do not carry out any of these actions, the new SAP standard becomes active in your SAP System and your modifications are therefore overwritten. In a later upgrade, you will be prompted once again to adjust these modifications. It is therefore important that you perform one of the two actions to minimize the work involved in future upgrades.