How To Fix BRF659 - Conversion of expression &1 is not possible; expression is inconsistent

BRF659 - Overview

• Message type: E = Error

• Message class: BRF - Messages for Business Rule Framework

• Message number: 659

• Message text: Conversion of expression &1 is not possible; expression is inconsistent

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message BRF659 - Conversion of expression &1 is not possible; expression is inconsistent ?

  The SAP error message BRF659, which states "Conversion of expression &1 is not possible; expression is inconsistent," typically occurs in the context of Business Rule Framework (BRF+) when there is an issue with the expression or rule definition that is being evaluated. Here’s a breakdown of the potential causes, solutions, and related information for this error:
  Causes:
  
  
  Inconsistent Data Types: The expression may involve data types that are incompatible with each other. For example, trying to perform arithmetic operations on strings or using a string in a numeric context.
  
  
  Missing or Incorrect Parameters: If the expression references parameters or variables that are not defined or are incorrectly defined, it can lead to inconsistencies.
  
  
  Logical Errors in Expressions: The logic used in the expression may be flawed, such as using operators or functions that do not align with the expected input types.
  
  
  Invalid Function Calls: If the expression includes function calls that are not valid or