How To Fix WD215 - Task '&' is not fully defined

WD215 - Overview

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 215

• Message text: Task '&' is not fully defined

What causes this issue?

No terminating events are defined for the task used.

How to fix this error?

Please define at least one terminating event for the task used, or mark
the method as a "synchronous object method".

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Enter the task again in the activity to copy the changed settings to the
workflow.

Error message extract from SAP system. Copyright SAP SE.

WD215 - Details

• The SAP Web Dynpro error message:
  WD215 Task '&' is not fully defined
  
  
  Cause:
  This error occurs when a task in a Web Dynpro component's component controller or window controller is referenced but not completely defined. Specifically, the task is declared but lacks a proper implementation or is missing required attributes such as the inbound plug, outbound plug, or the task itself is not properly linked in the component's configuration.
  In other words, the Web Dynpro runtime expects a task (which is a navigation or processing unit) to be fully defined with all necessary plugs and attributes, but it finds an incomplete or missing definition.
  
  Common scenarios causing this error:
  
  A task is declared in the component but the inbound or outbound plugs are missing or not assigned.
  The task is referenced in the code or configuration but not created or fully configured in the Web Dynpro component.
  The task name is incorrect or misspelled in the code