Solution : https://service.sap.com/sap/support/notes/837308 (SAP Service marketplace login required)
Key words :
create message t100 manually, message class wd number, source code corrections, runtime version exists, current version differs, workflow builder stores, starts transaction swdd, transaction swdd, status message, active version
Related Notes :
| 845557 | Workflow Builder: Problems with versions after copying |
| 571302 | Collective note relating to Transports in workflow |