HCM_CVI_MAP_BP

Dears ,

Kinldy i have question regarding badi CVI_CUSTOM_MAPPER and its implementation HCM_CVI_MAP_BP ,

according to sap note 3078746 it has to be implemented is it has any thing to do with employee code not being read by the system?

Knowing it is for ECC buisness partner not S/4hana