How To Fix WER_UI042 - Please select an expression type

SAP Error Message - Details

• Message type: E = Error

• Message class: WER_UI - UI related messages

• Message number: 042

• Message text: Please select an expression type

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WER_UI042 - Please select an expression type ?

  SAP Error Message:
  
  WER_UI042 – Please select an expression type
  
  Cause:
  This error occurs when you are working with SAP Workflow or Business Rule Framework plus (BRFplus) and you attempt to create or edit an expression without selecting the required expression type. The system expects you to specify what kind of expression you want to define (e.g., constant, variable, formula, function call, etc.), but this selection was not made.
  In other words, the error is triggered because the expression type is mandatory for the system to know how to process or evaluate the expression, and it was left blank or not chosen.
  
  When does it typically occur?
  
  While defining or editing expressions in BRFplus (Business Rule Framework plus).
  When creating conditions, rules, or formulas in SAP Workflow or decision tables.
  During the configuration of decision logic where expressions are required.
  
  
  Solution:
  
  
  Select an Expression Type:
  
  When prompted to create or edit an expression, ensure you explicitly select the expression type from the available options.
  Common expression types include:
  
  Constant
  Variable
  Formula
  Function Call
  Table Lookup
  Decision Table
  Script
  
  
  The UI usually provides a dropdown or selection screen to choose the expression type.
  
  
  
  Save and Continue:
  
  After selecting the expression type, proceed with defining the expression details.
  Save your changes and continue with the workflow or rule configuration.
  
  
  
  Check for UI or Authorization Issues:
  
  If the selection screen does not appear or the option is greyed out, verify that you have the necessary authorizations.
  Also, check for any UI errors or inconsistencies in the BRFplus or workflow configuration.
  
  
  
  
  Additional Information:
  
  BRFplus (Business Rule Framework plus): A framework in SAP for defining, managing, and executing business rules and decision logic.
  Expression types are fundamental in BRFplus because they define how the system interprets and evaluates the logic.
  Always ensure that the expression type matches the intended logic you want to implement.
  If you are new to BRFplus, consider reviewing SAP documentation or tutorials on creating expressions and rules.
  
  
  References:
  
  SAP Help Portal: BRFplus Documentation
  SAP Notes and Community forums often discuss similar issues related to expression types in workflows and BRFplus.
  
  
  Summary:
  
  The error WER_UI042 means you must select an expression type before proceeding. To fix it, simply choose the appropriate expression type in the UI when creating or editing an expression in SAP Workflow or BRFplus.