Solution : https://service.sap.com/sap/support/notes/128905 (SAP Service marketplace login required)
Key words :
structure t_lfb5 lfb5 optional t_lfza lfza optional t_lfbw lfbw optionalcustomerscall, structure t_knb5 knb5 optional t_knza knza optionalsave, withholding tax table lfbw, additional key words sapmf02k, change function module calls, box object components, form routine 'aufruf_user_exit', table parameter ref, vendor master data, customer master data
Related Notes :
| 371518 | Interface of the user exit is not complete |