Solution : https://service.sap.com/sap/support/notes/615501 (SAP Service marketplace login required)
Key words :
create shipping notifications, long runtimes occurred, long runtimes, transaction vl31n, terms desadv, inbound delivery, correction instructions, confirmation, performanceeditfact, desadvansix12
Related Notes :
| 622903 | Poor performance when changing confirmation data |
| 491785 | Return delivery after GR with VL32 or VL32N |