SAP Message V4256 - Document no longer modifiable; purch. orders in doc. flow are archived

Diagnosis
Purchase orders have already been archived in the document flow of thesales document.

System Response
You can no longer change the sales document.

Procedure
You can display the sales document using the corresponding displaytransaction. The archived purchase orders are read from the archive.Depending on how the archive is structured, this can take a long time.Purchase orders must be read from the archive to calculate differentstatuses in the sales document.