Error - 'Unable to format sort code for field supplier bank sort code' when trying to run BACS Export.

Select the Creditors tab.

Select Suppliers.

Select Find.

Enter Supplier Code.

Click Edit.

Select Bank tab.

Enter 6-digit Sort Code (for standard export formats) and click Save.

If you have a large number of Suppliers, you may want to look at doing this in smaller batches to find the incorrect one