How To Fix BRAIN_DEV646 - MultiProvider with compounding problem - no exception aggregation in HANA

SAP Error Message - Details

• Message type: E = Error

• Message class: BRAIN_DEV - BRAIN messages (for use by development)

• Message number: 646

• Message text: MultiProvider with compounding problem - no exception aggregation in HANA

What causes this issue?

The underlying MultiProvider has a compounding problem, as described in
OSS Note 1009987.

System Response

Exception aggregation cannot be executed in SAP HANA / BWA.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BRAIN_DEV646 - MultiProvider with compounding problem - no exception aggregation in HANA ?

  The SAP error message BRAIN_DEV646 indicates that there is a problem with a MultiProvider in SAP BW (Business Warehouse) that is using compounding, and it is related to the inability to perform exception aggregation in HANA. This issue typically arises when you are trying to execute queries that involve compounded characteristics in a MultiProvider, and the underlying data model does not support the required aggregation.
  Cause:
  
  Compounding Issues: The error often occurs when a MultiProvider is defined with compounded characteristics, and the underlying InfoProviders do not support the necessary aggregation for those characteristics.
  HANA Limitations: HANA has specific requirements and limitations regarding how data is aggregated, especially when it comes to compounded characteristics. If the data model does not align with these requirements, it can lead to this error.
  Query Design: The design of the query may not be compatible with the data model, particularly if it involves complex aggregations or calculations that cannot be resolved in HANA.
  
  Solution:
  
  Review MultiProvider Design: Check the design of the MultiProvider and ensure that it is correctly set up to handle compounded characteristics. You may need to adjust the InfoProviders or the way they are combined.
  Adjust Compounding: If possible, consider removing or simplifying the compounding of characteristics in the MultiProvider. This may involve redesigning the data model to avoid the use of compounded characteristics.
  Check Aggregation Settings: Ensure that the aggregation settings for the InfoProviders are correctly configured. You may need to define how exceptions should be handled in the aggregation process.
  Use HANA-Optimized Queries: If you are using HANA, consider using HANA-optimized queries that are designed to work with the HANA database's capabilities and limitations.
  Consult SAP Notes: Check for any relevant SAP Notes or documentation that may provide additional guidance or fixes related to this error. SAP frequently updates its knowledge base with solutions for known issues.
  
  Related Information:
  
  SAP BW/4HANA: If you are using SAP BW/4HANA, be aware of the specific features and limitations of this version, as it may differ from traditional SAP BW.
  Performance Considerations: When working with HANA, consider performance implications and how data is modeled, as HANA is optimized for certain types of queries and data structures.
  Testing and Validation: After making changes, thoroughly test the MultiProvider and associated queries to ensure that the error is resolved and that the data is being aggregated correctly.
  
  If the problem persists after trying these solutions, it may be beneficial to engage with SAP support or consult with a BW/HANA expert for more tailored assistance.