This error occurs because an employee's bank account contains a dash. Please follow the steps below to fix this error:
Core module
Go to Reports, Employment Reports.
Select Bank Allocation Report.
Click Export.
Review this report to find the employee bank account that has a dash in it.
Take note of the employee ID and close the screen.
Go to Bank Allocation and search for the employee ID.
Remove the dash from the account number and click Save.
Payroll module
Go to Pay Record, highlight the employee ID and click Reprocess.
Go to Reports, Bank Disk Generation.
Generate the bank files again.