SAP Message WL409 - Workflow '&' no. &: Element '_WF_Initiator' missing in workflow container

Diagnosis
When the (sub)workflow '&V1&' (no. &V2&, step or definition no. &V3&)was created, there was no initiator (element _WF_Initiator) inthe workflow container.

System Response
The workflow was started without the element _WF_Initiator.
This leads to problems if the workflow (or one of its subworkflows)uses the element _WF_Initiator as the agent of a task.

Procedure
Make sure a binding has been defined for the element _WF_Initiator
from the event which started the workflow to the container of theworkflow task '&V1&' (no. &V2&). The element EVT_CREATOR of theevent container generally contains a user name or anotherorganizational unit which can be used for this binding definition.
When the workflow is started in dialog, this error should not occursince the initiator is then set automatically by the appropriateworkflow transaction.
When a subworkflow is started, the initiator of the higher-level parentworkflow is used automatically.