Solution : https://service.sap.com/sap/support/notes/1402685 (SAP Service marketplace login required)
Key words :
abap runtime error message_type_x, user wf-batch, terms sww_ei_event_receive reason, open wait steps, terminated event receiver, error handling, class cl_swf_run_transaction_manager, message class, workflow persistence, made stricter
Related Notes :
| 1068627 | Composite note about workflow upgrade |
| 655260 | Missing event container during upgrade 4.6 -> 6.20 ... |