How To Fix RSDD818 - Only choose one aggregate

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDD - Message class for data manager

• Message number: 818

• Message text: Only choose one aggregate

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 RSDD818 - Only choose one aggregate ?

  The SAP error message RSDD818, which states "Only choose one aggregate," typically occurs in the context of SAP BW (Business Warehouse) when a user attempts to execute a query or perform an operation that involves multiple aggregates, but the system only allows the selection of one aggregate at a time.
  Cause:
  The primary cause of this error is that the query or operation you are trying to execute is designed to work with a single aggregate. In SAP BW, aggregates are pre-calculated summaries of data that improve query performance. When multiple aggregates are selected, the system cannot determine which one to use, leading to this error.
  Solution:
  To resolve the RSDD818 error, follow these steps:
  
  
  Check Query Settings: Review the query settings in the BEx Query Designer. Ensure that you are not inadvertently selecting multiple aggregates. You may need to adjust the query to focus on a single aggregate.
  
  
  Modify Aggregate Settings: If you are using a specific InfoProvider or InfoCube, check the aggregate settings. Make sure that the query is set to use only one aggregate. You can do this by:
  
  Opening the InfoProvider in the SAP BW modeling tools.
  Navigating to the aggregates section and ensuring that only one aggregate is marked for use.
  
  
  
  Rebuild Aggregates: If necessary, you can rebuild the aggregates to ensure they are correctly configured. This can be done through the administration workbench in SAP BW.
  
  
  Test the Query: After making the necessary adjustments, test the query again to see if the error persists.
  
  
  Consult Documentation: If the issue continues, refer to SAP documentation or support resources for further guidance on handling aggregates in your specific version of SAP BW.
  
  
  Related Information:
  
  Aggregates in SAP BW: Aggregates are used to improve performance by pre-calculating data summaries. Understanding how they work and how to manage them is crucial for effective query performance.
  BEx Query Designer: This is the tool used to create and modify queries in SAP BW. Familiarity with its features can help in troubleshooting issues like RSDD818.
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message, as there may be known issues or fixes provided by SAP.
  
  By following these steps, you should be able to resolve the RSDD818 error and successfully execute your queries in SAP BW.