Here we would like to draw your attention to RSA2OLD transaction code in SAP. As we know it is being used in the SAP BC-BW (BW Service API in Basis) component which is coming under BC module (BASIS).RSA2OLD is a transaction code used for SAPI DataSource (Old GUI) in SAP.
It comes under the package RSUM.When we execute this transaction code, RSA1RSA2 is the normal standard SAP program that is being executed in background.
Transaction RSA2OLD technical data table
|Purpose||SAPI DataSource (Old GUI)|