How To Fix WD265 - Expression '&' is not defined

SAP Error Message - Details

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 265

• Message text: Expression '&' is not defined

Self-Explanatory Message

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• What is the cause and solution for SAP error message WD265 - Expression '&' is not defined ?

  The SAP Web Dynpro error message:
  WD265 Expression '&' is not defined
  
  Cause:
  This error occurs when the Web Dynpro application tries to evaluate an expression that contains an undefined or incorrectly specified context attribute or variable. The ampersand (&) symbol is used in Web Dynpro expressions to denote context attributes or variables. If the expression references & without a valid attribute name following it, or if the attribute name is misspelled or missing, the system cannot resolve the expression, resulting in this error.
  Common causes include:
  
  Typographical errors in the expression (e.g., & used alone or & followed by an invalid attribute name).
  The context attribute referenced does not exist or is not properly defined in the component/controller context.
  The expression syntax is incomplete or malformed.
  Copy-paste errors where the expression placeholder & was left without a proper attribute.
  
  
  Solution:
  
  
  Check the Expression Syntax:
  
  Verify that the expression is correctly written.
  Ensure that every & is followed by a valid context attribute name.
  Example of correct usage: &ContextAttributeName&
  
  
  
  Verify Context Attribute:
  
  Open the Web Dynpro component or view controller.
  Check the context tab to confirm that the attribute referenced in the expression exists.
  Make sure the attribute name matches exactly (case-sensitive).
  
  
  
  Correct the Expression:
  
  If the expression is incomplete or has stray & symbols, fix or remove them.
  For example, if the expression is just &, replace it with a valid attribute or remove it.
  
  
  
  Rebuild and Test:
  
  After correcting the expression, save and activate the component.
  Test the application again to confirm the error is resolved.
  
  
  
  
  Related Information:
  
  Web Dynpro Expression Syntax: Expressions in Web Dynpro use & to denote context attributes, e.g., &AttributeName&.
  Context Attributes: These are defined in the context tab of the Web Dynpro component or controller.
  Debugging Tips:
  
  Use the Web Dynpro Explorer to inspect context attributes.
  Use the Web Dynpro trace or debugger to check the evaluation of expressions.
  
  
  SAP Notes and Documentation:
  
  Check SAP Help Portal for Web Dynpro expression syntax.
  Search SAP Notes for similar issues if the problem persists.
  
  
  
  
  Summary:
  
  The error WD265 Expression '&' is not defined means the expression contains an undefined or malformed context attribute reference. Correct the expression by ensuring all & symbols are properly paired with valid context attribute names. Verify the context attributes exist and are correctly spelled. Then activate and test the application again.