How To Fix WER142 - Boolean expression operands are not valid

WER142 - Overview

• Message type: E = Error

• Message class: WER - Messages for the package WER

• Message number: 142

• Message text: Boolean expression operands are not valid

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WER142 - Boolean expression operands are not valid ?

  SAP Error Message:
  WER142 - Boolean expression operands are not valid
  
  Cause
  This error occurs when a Boolean expression in a SAP workflow or ABAP code contains operands that are not valid Boolean values. In other words, the system expects operands that evaluate to TRUE or FALSE (Boolean type), but it encounters operands of incompatible data types (e.g., strings, integers, or other non-Boolean types).
  Common scenarios include:
  
  Using non-Boolean variables or fields in conditions or expressions.
  Incorrectly constructed logical expressions in workflow conditions or decision steps.
  Passing parameters of wrong data types to Boolean expressions in workflow rules or ABAP code.
  
  
  Explanation
  In SAP workflows and ABAP, Boolean expressions are used to control the flow based on conditions. These expressions must be composed of operands that can be evaluated as TRUE or FALSE. If the operands are not Boolean or cannot be implicitly converted to Boolean, the system raises the WER142 error.
  
  Solution
  
  
  Check the operands in the Boolean expression:
  
  Verify that