Bank File import is ignoring the footer tag and trying to import the record as a line - thus erroring on the date field its searching for - given these characters are blank in the file.
If I delete the footer line and import, the file imports without issue. This is not what you want to happen with a customer.
I have a file type Fixed Text file to import. I have configured the Line Definitions for Header, Detail and Footer - just to be safe. I have set the Reading/Writing Codeunit to 1241 and Ext. Data Handling Codeunit to 1240.
I have the column record type as Text.
In the Footer Tag I have entered 99
In the Line Definitions I have defined column 1 (in all types - Header, Detail, Footer) as 2 characters in length.
The screenshot just shows the text file sample including header, lines and footer.
Without getting a developer to customise the code unit - this should be able to import.