Solution : https://service.sap.com/sap/support/notes/330393 (SAP Service marketplace login required)
Key words :
sgrw_docu_cons_notesgrw_om sgrw_ps sgrw_pc sgrw_sl sgrw_pca sgrw_ec sgrw_lis, additional key words text variables, program 'saplgrwr'--> text elements --> change, general text variable 'unit', general text variable 'currency', text symbol text-160, text variable displays, text variable 'unit', function group grwr, unique currency unit
Related Notes :
327907 | Report Writer: Currency display in report texts |
216740 | Report Writer: Text variable for reporting currency |
199787 | 4.6 text variables / new logic |