How To Fix FDT_EXPRESSIONS636 - &1 is not of type data object, can't be used as changing parameter

FDT_EXPRESSIONS636 - Overview

• Message type: E = Error

• Message class: FDT_EXPRESSIONS - Formula & Derivation Tool: Expressions

• Message number: 636

• Message text: &1 is not of type data object, can't be used as changing parameter

Self-Explanatory Message

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FDT_EXPRESSIONS636 - Details

• The SAP error message FDT_EXPRESSIONS636 indicates that there is an issue with the type of a variable being used as a changing parameter in a function module or method. Specifically, the error message states that the variable (denoted by &1) is not of the expected type "data object," which means it cannot be used as a changing parameter.
  
  Cause:
  
  Incorrect Data Type: The variable you are trying to use as a changing parameter is not of the correct data type. Changing parameters in SAP must be of a specific type that allows for modification.
  Variable Declaration: The variable may not have been declared properly or may have been declared as a constant or a different type that does not allow for changes.
  Contextual Misuse: The variable might be used in a context where it is not expected to be a changing parameter, such as in a function module that does not support changing parameters.
  
  
  Solution:
  
  Check