How To Fix RSDD421 - '&3': Aggregation level '%' is not allowed for characteristic &1

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDD - Message class for data manager

• Message number: 421

• Message text: '&3': Aggregation level '%' is not allowed for characteristic &1

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSDD421 - '&3': Aggregation level '%' is not allowed for characteristic &1 ?

  The SAP error message RSDD421 indicates that there is an issue with the aggregation level in a query or report related to the characteristics defined in your data model. Specifically, the message states that the aggregation level you are trying to use is not allowed for a particular characteristic.
  Cause:
  
  Invalid Aggregation Level: The aggregation level you are trying to use may not be compatible with the characteristic specified. This can happen if the characteristic is not included in the aggregation level definition or if it is not allowed for the specific context of the query.
  Missing Characteristics: The characteristic may not be part of the aggregation level, which means that the system cannot aggregate data based on that characteristic.
  Hierarchy Issues: If the characteristic is part of a hierarchy, there may be restrictions on how it can be aggregated.
  Data Model Changes: Changes in the underlying data model or InfoProvider may have led to inconsistencies with the defined aggregation levels.
  
  Solution:
  
  Check Aggregation Level Definition: Review the aggregation level definition in the SAP BW system. Ensure that the characteristic in question is included in the aggregation level.
  Modify Query: If the characteristic is not needed for the query, consider removing it from the query definition.
  Adjust Hierarchies: If the characteristic is part of a hierarchy, ensure that the hierarchy is correctly defined and that the aggregation level supports it.
  Recreate Aggregation Level: If necessary, recreate the aggregation level to include the required characteristics and ensure it aligns with the data model.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on defining aggregation levels and characteristics.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like RSA1 (Data Warehousing Workbench) to check and modify the aggregation levels and characteristics.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance on this error message.
  BW Modeling Tools: If you are using BW Modeling Tools, ensure that the modeling is consistent with the requirements of your queries and reports.
  
  By following these steps, you should be able to resolve the RSDD421 error and ensure that your queries run successfully with the correct aggregation levels.