How To Fix WD289 - Multiple line expression not permitted

SAP Error Message - Details

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 289

• Message text: Multiple line expression not permitted

What causes this issue?

You have entered the multi-line expression &V1& for the agent
assignment at this step.

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

System Response

Multi-line expressions cannnot be processed by the system at present.

How to fix this error?

Please enter a single-line expression with reference to a DDIC field
behind which the domain HROBJEC_14 is situated.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WD289 - Multiple line expression not permitted ?

  SAP Error Message:
  
  WD289 Multiple line expression not permitted
  
  Cause:
  This error occurs in Web Dynpro ABAP when you try to use a multi-line expression in a context where only a single-line expression is allowed. Specifically, the error is triggered if you write an expression spanning multiple lines (e.g., using line breaks or multiple statements) in places like property bindings, UI element attributes, or other expression fields that expect a single-line expression.
  For example, in the Web Dynpro context, if you try to write something like:
  if condition = true then
    value = 'X'.
  endif.
  in a property binding or expression editor, it will cause this error because the expression editor expects a single-line expression, not a block of code.
  
  Solution:
  
  
  Use a single-line expression: Rewrite the expression as a single line. For example, use the ABAP inline if expression or a simple expression that fits in one line.
  
  
  Move complex logic to the context or method: If the logic is complex and cannot be expressed in a single line, implement it in a method or context attribute and then bind the UI element to that method or attribute.
  
  
  Example:
  
  
  Instead of writing:
  if iv_flag = abap_true.
    ev_result = 'X'.
  else.
    ev_result = ''.
  endif.
  Use a single-line expression like:
  ev_result = iv_flag = abap_true ? 'X' : ''.
  Or better, implement the logic in a method and bind the UI element to the method's return value.
  
  Related Information:
  
  This error is common in Web Dynpro ABAP when using the expression editor for UI element properties.
  The expression editor supports only single-line expressions.
  For complex logic, always use methods or context attributes.
  See SAP Note or documentation on Web Dynpro expression editor limitations.
  SAP Help Portal: Web Dynpro ABAP - Expression Editor and Binding Restrictions.
  
  
  Summary:
  
  
  
  Aspect
  Description
  
  
  
  
  Cause
  Multi-line or block expressions used where only single-line expressions are allowed.
  
  
  Solution
  Rewrite as single-line expression or move logic to method/context attribute.
  
  
  Related
  Web Dynpro ABAP expression editor limitations; use methods for complex logic.
  
  
  
  
  If you provide the exact code snippet or context where the error occurs, I can help rewrite it accordingly.