Here we would like to draw your attention to CNV_FIELDS transaction code in SAP. As we know it is being used in the SAP CA-GTF (General Application Functions in CA) component which is coming under CA module (Cross Application).CNV_FIELDS is a transaction code used for CNV: Field-rel. control in SAP.
It comes under the package CNV_BASIS.
Transaction CNV_FIELDS technical data table
|Purpose||CNV: Field-rel. control|