How To Fix /CFG/CO_MSG021 - Data query on non key field &1 is not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: /CFG/CO_MSG -

• Message number: 021

• Message text: Data query on non key field &1 is not supported

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /CFG/CO_MSG021 - Data query on non key field &1 is not supported ?

  The SAP error message /CFG/CO_MSG021 indicates that a data query is being attempted on a non-key field in a configuration context, which is not supported. This typically occurs in the context of SAP's configuration management or when working with certain data queries in the system.
  Cause:
  The error is triggered when a query is executed on a field that is not defined as a key field in the relevant database table or data structure. In SAP, key fields are essential for uniquely identifying records, and queries on non-key fields may not be supported due to performance or data integrity reasons.
  Solution:
  To resolve this error, consider the following steps:
  
  
  Check the Query Definition: Review the query that is being executed. Ensure that it is only using key fields for filtering or selection criteria. If non-key fields are being used, modify the query to use key fields instead.
  
  
  Modify the Data Model: If you need to query on a non-key field, consider whether the data model can be adjusted. This might involve adding the non-key field as a key field if it makes sense for your data structure and business logic.
  
  
  Use Alternative Queries: If the query cannot be modified to use key fields, look for alternative ways to retrieve the data. This might involve using different transaction codes, reports, or custom ABAP programs that can handle non-key field queries.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on querying data in the context you are working in. This can provide insights into best practices and limitations.
  
  
  Check Authorizations: Ensure that you have the necessary authorizations to execute the query. Sometimes, authorization issues can lead to unexpected error messages.
  
  
  Contact SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP support for assistance. They may provide insights specific to your system configuration or version.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  Transaction Codes: Familiarize yourself with transaction codes related to configuration management and data queries, such as SE11 (Data Dictionary), SE80 (Object Navigator), or SQ01/SQ02 (SAP Query).
  Performance Considerations: Understand the implications of querying non-key fields in terms of performance and data retrieval efficiency.
  
  By following these steps, you should be able to address the error and successfully execute your queries in SAP.