Solution : https://service.sap.com/sap/support/notes/190976 (SAP Service marketplace login required)
Key words :
operation & exists' choose 'save' message number, 'iw' choose 'change' message number, -operation &1 &2 exists' choose 'save', '707' choose 'individual maintenance' enter, '708' choose 'individual maintenance' enter, -object 'messages' message class, additional key words iw32, transaction se91 select, open purchase orders, warning message
Related Notes :
| 311122 | Error CO254 when deleting operation of an order |
| 307412 | Deleting operation not possible |
| 157249 | OPR_NOT_FOUND after deletion of operation |
| 138993 | CO01,02: Deleting component with purchase order |