How To Fix WD425 - Relational operator '&' not defined

WD425 - Overview

• Message type: E = Error

• Message class: WD - Workflow definition

• Message number: 425

• Message text: Relational operator '&' not defined

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WD425 - Relational operator '&' not defined ?

  Certainly! Here's a detailed explanation for the SAP error message WD425: Relational operator '&' not defined:
  
  Error Message
  WD425: Relational operator '&' not defined
  
  Cause
  This error occurs in the context of Web Dynpro ABAP when a relational operator used in an expression or condition is not recognized or supported by the Web Dynpro expression parser.
  Specifically, the operator '&' is not a valid relational operator in Web Dynpro expressions. The ampersand (&) is often mistakenly used by developers who might confuse it with logical operators or string concatenation operators from other contexts.
  
  In ABAP, & is not a relational operator.
  In Web Dynpro expressions, only certain relational operators are allowed, such as:
  =, <>, <, >, <=, >=
  
  
  Logical operators like AND, OR, NOT are used for combining conditions.
  The & operator is not defined as a relational or logical operator in Web Dynpro expressions.
  
  
  When does it happen?
  
  When you write an expression in Web Dynpro (e.g., in a context