Solution : https://service.sap.com/sap/support/notes/93831 (SAP Service marketplace login required)
Key words :
additional key words billing document, system prints billing documents, payment order correctly, 5-character subscriber number, 15-character reference number, special character '<', por procedure, coding line, program error, sd_esr_get_data
Related Notes :
| 80415 | POR procedure - collective note |