Solution : https://service.sap.com/sap/support/notes/204254 (SAP Service marketplace login required)
Key words :
business partner bank account numbers, symptom related note 96624 describes, additional key words lfbk, iso country code prior, long account numbers, bank country key, bank country inquiry, iso code 'pl', sap country code, customer program zfbankac
Related Notes :
206975 | CONVERT_BANK_ACCOUNT_NUM_LONG: cstmr spcfc cntry ky |
96624 | DME for bank account numbers with more than 18 digits |