How To Fix WD278 - Operation not allowed on object and constant

SAP Error Message - Details

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 278

• Message text: Operation not allowed on object and constant

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WD278 - Operation not allowed on object and constant ?

  SAP Error Message:
  WD278 - Operation not allowed on object and constant
  
  
  Cause:
  This error typically occurs in the context of Web Dynpro ABAP programming when there is an attempt to perform an operation on an object or a constant that is not allowed. Specifically, it often happens when you try to modify or perform certain operations on:
  
  Constants: Since constants are immutable by definition, any attempt to change their value or perform operations that imply modification will trigger this error.
  Objects in an invalid state: For example, trying to perform operations on an object reference that is initial (null) or on an object that does not support the requested operation.
  Read-only or protected objects: Objects or attributes that are read-only or have restricted access may cause this error if you try to modify them.
  
  In Web Dynpro, this can also happen if you try to change the value of a context attribute that is defined as