Lockbox - Error in Lockbox Validation - APP: ERROR The invoice application amount cannot be less tha

 Hi,

I get this error when I run Lockbox process validation: APP: ERROR The invoice application amount cannot be less than zero.

My customer wants to import a file with negative amounts (Credit Memos) using the record type 4 (Overflow).

The negative amounts are cash discounts and credit memos taken on the payment.

In the file they are taking the credit memo but paying the cash discount amount back taken on the original invoice.

This reduces the amount of credit they are eligible to take since they took the full cash discount when they paid the invoice.

Is that possible? I red in some papers that credit memos are allowed in lockbox process.