https://userapps.support.sap.com/sap/support/knowledge/en/1876050
1876050 - BAPI warning and information messages - SAP ERP & SAP S/4HANA | SAP Knowledge Base Article
An invoice is created with the use of the BAPI_INCOMINGINVOICE_CREATE. A message is set as a warning or information message in transaction OMRM. The message is...