Solution : https://service.sap.com/sap/support/notes/378926 (SAP Service marketplace login required)
Key words :
exchange rate type msource currency transaction currencytranslation date posting date solution, code segments add additional ml-currencies loop, key curtp = t_kokrs_cvtypes-cvtyp, t_curtp_for_va-curtp = t_tckmit-cvtyp, t_curtp_for_va-curtp = t_kokrs_cvtypes-cvtyp, posting datefor basw, document date, manage currency types, function module get_bwkey_currency_info, read table lt_curtp_acc
Related Notes :
| 789592 | BAdI for currency translation rules in the material ledger |
| 374496 | Rules for currency translation with active material ledger |