How To Fix DS356 - A sort key can only be chosen once

SAP Error Message - Details

• Message type: E = Error

• Message class: DS - Messages for Editing Text Elements in ABAP Programs

• Message number: 356

• Message text: A sort key can only be chosen once

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 DS356 - A sort key can only be chosen once ?

  The SAP error message DS356, which states "A sort key can only be chosen once," typically occurs in the context of data processing or reporting, particularly when dealing with data extraction or transformation processes in SAP BW (Business Warehouse) or similar environments. This error indicates that a sort key has been assigned multiple times in a context where it should only be assigned once.
  Cause:
  
  
  Duplicate Sort Key Assignment: The most common cause of this error is that the same sort key has been assigned to multiple fields or dimensions in a query or data model. In SAP BW, sort keys are used to define the order in which data is processed or displayed, and each sort key must be unique within its context.
  
  
  Incorrect Query Design: If you are designing a query in SAP BW and you inadvertently select the same sort key for different characteristics or measures, this error will be triggered.
  
  
  Data Model Configuration: In some cases, the error may arise from the configuration of InfoObjects or InfoProviders where sort keys are defined.
  
  
  Solution:
  
  
  Review Sort Key Assignments: Go through the query or data model where the error is occurring and check the sort key assignments. Ensure that each sort key is assigned only once.
  
  
  Modify Query Design: If you are working with a query, modify the design to ensure that no two fields are using the same sort key. You may need to remove or change the sort key for one of the fields.
  
  
  Check InfoObject Settings: If the error is related to InfoObjects, check the settings for each InfoObject to ensure that sort keys are not duplicated.
  
  
  Testing: After making the necessary changes, test the query or data extraction process again to ensure that the error has been resolved.
  
  
  Related Information:
  
  SAP Notes and Documentation: Check SAP Notes for any specific guidance or patches related to this error. SAP's support portal may have additional resources or updates that address this issue.
  SAP Community: Engaging with the SAP Community forums can provide insights from other users who may have encountered and resolved similar issues.
  Training and Best Practices: Familiarize yourself with best practices for designing queries and data models in SAP BW to avoid similar issues in the future.
  
  By following these steps, you should be able to resolve the DS356 error and ensure that your data processing or reporting functions correctly.