Solution : https://service.sap.com/sap/support/notes/456352 (SAP Service marketplace login required)
Key words :
component / function module exit_saplniw1_001, -mentioned user exit, import parameter i_bewtab, attached source code, customer enhancement niwe0002, reference type sniwebew, terms exit_saplniw1_001, niwe0002 reason, type specification, devaluation percentage