How To Fix KWUI020 - Unique attribute evaluated more than once

SAP Error Message - Details

• Message type: E = Error

• Message class: KWUI - Messages for KW UI Controls and Dialogs

• Message number: 020

• Message text: Unique attribute evaluated more than once

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message KWUI020 - Unique attribute evaluated more than once ?

  The SAP error message KWUI020, which states "Unique attribute evaluated more than once," typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when there is an issue with the uniqueness of attributes in a data model or query. This error indicates that a unique attribute is being evaluated multiple times, which can lead to ambiguity in the data retrieval process.
  Cause:
  
  Duplicate Attributes: The error often arises when a unique attribute is included in multiple places in a query or data model, leading to confusion about which instance of the attribute should be used.
  Incorrect Data Model Design: The data model may not be designed correctly, causing the same attribute to be evaluated in different contexts.
  Query Design Issues: If a query is constructed in a way that it references the same unique attribute multiple times, it can trigger this error.
  
  Solution:
  
  Review Query Design: Check the query to ensure that unique attributes are not being referenced multiple times. If they are, consider removing duplicates or restructuring the query.
  Adjust Data Model: If the issue is in the data model, review the design to ensure that unique attributes are defined correctly and are not duplicated across different dimensions or InfoObjects.
  Use Aggregation: If applicable, consider using aggregation or grouping to avoid evaluating the same unique attribute multiple times.
  Check for Joins: If the error occurs due to joins between tables or InfoProviders, ensure that the joins are set up correctly and that they do not lead to multiple evaluations of the same unique attribute.
  Consult Documentation: Refer to SAP documentation or community forums for specific guidance related to your version of SAP BW or HANA, as there may be version-specific considerations.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide patches or updates that could resolve the issue.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered the same issue and what solutions they have found.
  Testing: After making changes, test the query or data model thoroughly to ensure that the error is resolved and that the data is being retrieved correctly.
  
  By following these steps, you should be able to identify the cause of the KWUI020 error and implement a solution to resolve it.