Solution : https://service.sap.com/sap/support/notes/1507976 (SAP Service marketplace login required)
Key words :
workflow suddenly hangs, required workflow entries, workflow log, terms workflow, workflow expects, schedule manager, longer calls, 'reporterror' event, linkageschedule manager, scmo reason
Related Notes :
| 79634 | KP06ff.: Lock logic in manual planning |