How To Fix SALV_X_API124 - No sort allowed on CONSTANT column

SAP Error Message - Details

• Message type: E = Error

• Message class: SALV_X_API - Messages for ALV API exceptions

• Message number: 124

• Message text: No sort allowed on CONSTANT column

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SALV_X_API124 - No sort allowed on CONSTANT column ?

  The SAP error message SALV_X_API124: No sort allowed on CONSTANT column typically occurs when you are trying to sort a column in an ALV (ABAP List Viewer) grid that is defined as a constant. In ALV, constant columns are those that do not change their values and are not meant to be sorted.
  Cause:
  The error arises when:
  
  You attempt to sort a column that has been defined as a constant in the ALV output.
  The column is likely defined in the data structure or the field catalog as a constant, which means it does not have a dynamic value that can be sorted.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Field Catalog: Review the field catalog used for the ALV output. Ensure that the column you are trying to sort is not marked as a constant. If it is, you may need to remove the constant attribute.
  
  
  Modify the Data Structure: If the column is inherently a constant (e.g., a static value that does not change), consider whether it makes sense to allow sorting on it. If sorting is not necessary, you can simply avoid the sort operation.
  
  
  Change ALV Configuration: If you need to keep the column as a constant but still want to allow sorting on other columns, ensure that your ALV configuration does not attempt to sort the constant column.
  
  
  Use Dynamic Columns: If the column needs to be dynamic, consider changing the logic to ensure that it can have varying values, thus allowing sorting.
  
  
  Error Handling: Implement error handling in your code to catch this specific error and provide a user-friendly message or alternative action.
  
  
  Related Information:
  
  ALV Grid Control: Understand how ALV grid control works, including how to define field catalogs and the properties of columns.
  ABAP Documentation: Refer to the official SAP documentation for ALV and field catalogs for more detailed information on how to configure them properly.
  SAP Community: Check forums and community discussions for similar issues and solutions shared by other SAP developers.
  
  By following these steps, you should be able to resolve the SALV_X_API124 error and ensure that your ALV output behaves as expected.