Here we would like to draw your attention to GCVZ 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). GCVZ is a transaction code used for Rule Maintenance in SAP.
It comes under the package for Validation, Substitution and Rules (GVAL). When we execute this transaction code, RGUGBT00 is the normal standard SAP program that is being executed in background. Transaction code GCVZ is included in the SAP component for SAP_FIN.
Transaction GCVZ technical data table