Solution : https://service.sap.com/sap/support/notes/499648 (SAP Service marketplace login required)
Key words : 
bpc5 function group ibma, relevant support package, function module update_iban, short dump occurs, business partner transactions, short dump, business partners, treasury partner, terms bup1, table tiban
Related Notes : 
       
| 459993 | IBAN: Implementation in Treasury partner |