How To Fix WD503 - New task selected, enter expression for task

WD503 - Overview

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 503

• Message text: New task selected, enter expression for task

What causes this issue?

You have overwritten task &v1& with &v2&.
In addition, you have set the indicator <LS>task determined by
expression</> in order to determine the task dynamically at runtime.
If the task you have entered in the <ZH>control</> window is different
in the interface from the task which is determined dynamically at
runtime, there may be problems with the workflow execution.

System Response

The system informs you that the task to be executed has been determined
dynamically at runtime.

How to fix this error?

Check whether the new task &v2& has the same parameters as task &v1&,
otherwise the binding will not function properly at runtime.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WD503 - New task selected, enter expression for task ?

  The SAP Web Dynpro error message WD503 New task selected, enter expression for task typically occurs when you are working with task nodes in a Web Dynpro component and the system expects an expression to be entered for the task, but none has been provided.
  
  
  Cause:
  
  In a Web Dynpro component, when you define a task node in the component controller or in a window, you need to specify the task that the node should execute.
  This error occurs if you select a new task node but do not enter or assign the required expression or task name.
  Essentially, the system is prompting you to provide the expression that defines which task the node should trigger.
  
  
  Explanation:
  
  A task node in Web Dynpro represents a unit of work or a method that can be executed.
  When you add a new task node, you must bind it to a task (method) by entering an expression that points to