Here we would like to draw your attention to CNVMBTFIELDS transaction code in SAP. As we know it is being used in the SAP CA-EUR (European Monetary Union: Euro in CA) component which is coming under CA module (Cross Application).CNVMBTFIELDS is a transaction code used for fields / conversion rules in SAP.
It comes under the package CNV_MBT_PCL.
Transaction CNVMBTFIELDS technical data table
|Purpose||fields / conversion rules|