SAP Message 0D189 - Credit memo amount: partner &2 account &3 contract &4

Diagnosis
A credit memo amount has been produced in invoicing. However, thisfunctionality is not available in the invoicing program so invoicecreation is suppressed.
This is for:
Business partner: &V2&
Contract account: &V3&
Contract: &V4&

System Response
No invoice was produced.