Solution : https://service.sap.com/sap/support/notes/587806 (SAP Service marketplace login required)
Key words :
system generates error message f5266, amount split tab page, cpd data disappears, -time account postings, attached program corrections, program error, cpd screen, -time vendors, transaction miro, individual payee
Related Notes :
574671 | MIRO: Term of payment for amount split |