Here we would like to draw your attention to SE21 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).SE21 is a transaction code used for Package Builder in SAP.
It comes under the package SPAK_TOOL.When we execute this transaction code, PACKAGE_BUILDER_START is the normal standard SAP program that is being executed in background.
Transaction SE21 technical data table
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