In case you want to keep the basic checking function for Bank Control Key, dont change the setting in OY17.
You can generate the correct Bank control key from your Bank Key and Account Number as following:
- Run SE37
- Input BKK_CREATE_BANK_CHECK_DIG_FR and run it.
- Input your Bank Account, Bank Country and Bank Key then Execute
- The function will give you the "correct" Bank Control Key.
Note:
BKK_CREATE_BANK_CHECK_DIG_FR is a standard SAP function module.