2790587 - Error when trying to create a credit memo

You are trying to create a credit memo for a purchase order but end up with an error message:

"Quantity ABC not assigned to goods and services receipt
Sum of cash discount relevant items is negative. You can only post the supplier invoice if the sum of the cash discount relevant items is positive. Change the cash discount relevant indicator of the supplier invoice items accordingly.
Balance is not equal zero:XYZ.

The total gross amount differs from the sum of the subtotal and the total tax amounts. You need to adjust these amounts so that the balance is zero."

Business ByDesign

 Credit Memo, Purchase Order, Error message, Quantity, Supplier Invoicing. , KBA , AP-SIP-SIV , Supplier Invoice , How To