Diagnosis
A tax code was specified in some of the receivable/payable line items,and in others it was left as '**' or not entered at all. Furthermore,there are receivable/payable line items in the document that do nothave a discount base amount. This amount should therefore be determinedby the system (even if the cash discount rate 1 is zero).
This will cause problems when the system assigns the receivable/payableline items to the individual offsetting entries that are relevant forcash discount.

Procedure
Enter your receivable/payable line items consistently by eitherspecifying '**' (or no entry) as the tax code in all the line items orentering an explicit tax code in every line item.
If you cannot enter them consistently - for example, because some ofthe reconciliation accounts are tax-relevant and others are not, whichmeans that a code cannot be specified in every item - you have to makean explicit entry in the "Discount base" field in everyreceivable/payable line item (the entry may have to be zero).