Solution : https://service.sap.com/sap/support/notes/878129 (SAP Service marketplace login required)
Key words :
customer-specific billing variant zif01, customer-specific function group, customer-specific function module, customer-specific variant, function group ev50, function module isu_zif01, variant zif01, function module, module isu_zif01, customer namespace
Related Notes :
| 330267 | Transports between Basis Releases 4.6* and 6.* |