Here we would like to draw your attention to CNV_CUPF 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_CUPF is a transaction code used for CNV: Field Control, Custom. in SAP.
It comes under the package CNV_BASIS.
Transaction CNV_CUPF technical data table
|Purpose||CNV: Field Control, Custom.|