How To Fix WER194 - Expression &1 result parameter is not of type boolean

WER194 - Overview

• Message type: E = Error

• Message class: WER - Messages for the package WER

• Message number: 194

• Message text: Expression &1 result parameter is not of type boolean

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WER194 - Expression &1 result parameter is not of type boolean ?

  The SAP error message:
  WER194: Expression &1 result parameter is not of type boolean
  
  
  Cause:
  This error occurs when an expression in a condition or a rule is expected to return a boolean value (true or false), but the actual result is of a different data type (e.g., integer, string, or any non-boolean type). The system enforces that conditions or expressions used in decision tables, BRF+ rules, or other logical constructs must evaluate to a boolean to determine the flow or decision correctly.
  For example, in BRF+ (Business Rule Framework plus), if you define a rule or expression that is supposed to return a boolean but the expression returns a number or string, this error will be raised.
  
  
  Solution:
  
  
  Check the Expression Return Type:
  
  Review the expression or rule referenced in the error message.
  Ensure that the expression returns a boolean value (true or false).
  If the expression currently returns a numeric or string value, modify it to return