Solution : https://service.sap.com/sap/support/notes/442676 (SAP Service marketplace login required)
Key words :
symptom rftbbb00 generates payment requests, additional key words tb_fi_document_create_for_flow, function module mentioned, attached correction instructions, trading partner, field vbund, program error, prerequisites mentioned, source code, support packages
Related Notes :
391886 | RFTBBB00 generates payment requests without VBUND |