Here we would like to draw your attention to GR21 transaction code in SAP. As we know it is being used in the SAP FI-SL (Special Purpose Ledger in FI) component which is coming under FI module (Financial Accounting). GR21 is a transaction code used for Create Library in SAP.
It comes under the package for Report Painter / Report Writer (GRWT). When we execute this transaction code, SAPMGRWL is the normal standard SAP program that is being executed in background. Transaction code GR21 is included in the SAP component for SAP_FIN.
SAP GR21 menu path
See the possible menu paths to access the same report by avoiding entering the transaction code.
Logistics → Project System → Information System → Tools → Cost Element Reports → Define → Report Writer → Library → Create
Transaction GR21 technical data table