How To Fix FMCA_BRF133 - The result type of expression &1 must be Boolean

FMCA_BRF133 - Overview

• Message type: E = Error

• Message class: FMCA_BRF - FMCA -> BRF Interface

• Message number: 133

• Message text: The result type of expression &1 must be Boolean

Self-Explanatory Message

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FMCA_BRF133 - Details

• The SAP error message FMCA_BRF133, which states "The result type of expression &1 must be Boolean," typically occurs in the context of Business Rule Framework (BRF+) when a condition or expression is expected to return a Boolean value (true or false), but it is returning a different type of value.
  
  Cause:
  
  Incorrect Expression Type: The expression defined in the rule is not returning a Boolean value. For example, it might be returning a string, number, or another data type instead of a Boolean.
  Logical Errors: There may be logical errors in the way the expressions are constructed, leading to a non-Boolean result.
  Data Type Mismatch: The data types used in the expression may not be compatible with the expected Boolean output.
  
  
  Solution:
  
  
  Check the Expression: Review the expression that is causing the error. Ensure that it is designed to return a Boolean value. For example, if you are using a comparison operator (like =, >, <),