Solution : https://service.sap.com/sap/support/notes/811480 (SAP Service marketplace login required)
Key words :
message class /sapapo/om, activity status changed, extremely rare problem, improved error text, error text, create message 816, rare cases, note 783575 minimizes, technical point, reasonable timeframe
Related Notes :
1008187 | Composite note for problems w/ /SAPAPO/OM_LC_DOWNLOAD_UPLOAD |