How To Fix FDT_WD_EXPRESSION020 - Expression &1 is not a constant

FDT_WD_EXPRESSION020 - Overview

• Message type: E = Error

• Message class: FDT_WD_EXPRESSION -

• Message number: 020

• Message text: Expression &1 is not a constant

Self-Explanatory Message

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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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_WD_EXPRESSION020 - Expression &1 is not a constant ?

  The SAP error message FDT_WD_EXPRESSION020 indicates that there is an issue with an expression in a Web Dynpro application where the expression is expected to be a constant, but it is not. This typically occurs in the context of using expressions in the context of data binding or UI element properties.
  
  Cause:
  The error arises when:
  
  An expression is defined that is expected to evaluate to a constant value, but it references a variable or a dynamic value instead.
  The expression syntax is incorrect or does not conform to the expected format for constants.
  The context in which the expression is used does not allow for non-constant values.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the Expression: Review the expression that is causing the error. Ensure that it is indeed a constant value. For example, if you are trying to set a property to a string, it should be enclosed in quotes (e.g.,