Here we would like to draw your attention to AD21 transaction code in SAP. As we know it is being used in the SAP BC-DWB (ABAP Workbench, Java IDE and Infrastructure in Basis) component which is coming under BC module (BASIS).AD21 is a transaction code used for Matchcode maintenance (for IMG) in SAP.
It comes under the package SDD.When we execute this transaction code, SAPMSD20 is the normal standard SAP program that is being executed in background.
Transaction AD21 technical data table
|Purpose||Matchcode maintenance (for IMG)|