To be able to process this, you must check the box "Multiple coda files for 1 bank statement" at the diary level (menu>parameters>diaries, select diary, go to details and check the box "Multiple CODA files for 1 bank statement").
If this checkbox is checked, the imported bank statement will be numbered <year number><bank statement number><follow number>. Example: We receive statement 5 of the year 2015 then this will be no 1500500. If we receive another file for statement 5 in year 2015 then this will be nr 1500501.