If you require a BACS file be regenerated for a Direct Debit run for any reason:
From the Toolbar go to the Sales Ledger, Transmit Data, Sales BACS Regeneration.
For Direct Debits you do not need to enter a Payment Method, leave this field blank.
Populate the Generate For Date field with the relevant information for the run you need to regenerate.
Right-click and select Generate. This will generate the payment file for the direct debit run.