Solution : https://service.sap.com/sap/support/notes/1050155 (SAP Service marketplace login required)
Key words : 
sap banking services 5, attached correction instructions, payment agreement, calculated incorrectly, terms skip, bca_api_calc_get_installment reason, program error, support package 3, transaction snote, suspension
Related Notes : 
       
| 1049351 | SAP Banking Services 5.0 SP02 |