How To Fix WER142 - Boolean expression operands are not valid

SAP Error Message - Details

• 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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• 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 all operands used in the condition are of Boolean type (ABAP_BOOL or BOOLEAN).
  If operands are not Boolean, convert or map them to Boolean values before using them in the expression.
  
  
  
  Correct the data types:
  
  For example, if you are using a character or numeric field, explicitly compare it to a value to get a Boolean result:
  IF lv_status = 'X'.
    " This is a Boolean expression
  ENDIF.
  
  Avoid using raw fields directly as Boolean operands.
  
  
  
  In SAP Workflow:
  
  Check the workflow container elements used in the condition.
  Ensure that the container elements used in the Boolean expression are of type Boolean.
  If not, create a workflow step or method to convert or set a Boolean container element based on the original data.
  
  
  
  Debugging:
  
  Use the workflow log or ABAP debugger to identify which expression causes the error.
  Check the data types of the operands at runtime.
  
  
  
  Adjust the expression syntax:
  
  Make sure the Boolean expression syntax is correct.
  Use logical operators (AND, OR, NOT) properly with Boolean operands.
  
  
  
  
  Related Information
  
  
  SAP Note: Check for any SAP Notes related to WER142 for your specific SAP version.
  
  
  Workflow Container Elements: Always ensure container elements used in conditions are properly typed.
  
  
  ABAP Data Types: Familiarize yourself with ABAP data types and how to convert between them.
  
  
  SAP Help: Refer to SAP Workflow documentation on conditions and Boolean expressions.
  
  
  Example:
  Suppose you have a workflow condition like:
  &some_string& AND &some_number&
  This will cause WER142 because some_string and some_number are not Boolean. Instead, you should write:
  &some_string& = 'X' AND &some_number& > 0
  This way, each operand is a Boolean expression.
  
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  Boolean expression contains operands that are not Boolean or cannot be evaluated as Boolean.
  
  
  Solution
  Ensure operands are Boolean or convert them to Boolean before use in expressions.
  
  
  Check
  Workflow container element types, ABAP variable types, and expression syntax.
  
  
  Debug
  Use workflow logs and ABAP debugger to identify problematic expressions.
  
  
  
  
  If you provide the exact Boolean expression or workflow step causing the error, I can help you correct it specifically.