Solution : https://service.sap.com/sap/support/notes/1049588 (SAP Service marketplace login required)
Key words : 
prerequisites programming error solution implement, payment plan reason, payment conditions, period generator, alternative calculations, terms bca_api_calc_get_installment, correction instruction, installment conditions, installment, generation
Related Notes : 
       
| 1049351 | SAP Banking Services 5.0 SP02 |