How To Fix 0S168 - The requested aggregation level is unknown

SAP Error Message - Details

• Message type: E = Error

• Message class: 0S - Messages for the SQL trace

• Message number: 168

• Message text: The requested aggregation level is unknown

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 0S168 - The requested aggregation level is unknown ?

  The SAP error message 0S168, which states "The requested aggregation level is unknown," typically occurs in the context of SAP BW (Business Warehouse) or SAP BW/4HANA when a query is executed against an InfoProvider, and the system cannot find the specified aggregation level.
  Cause:
  
  Missing Aggregation Level: The aggregation level that the query is trying to access does not exist in the system. This can happen if the aggregation level was deleted or not created properly.
  Incorrect Query Definition: The query might be referencing an aggregation level that is not defined in the underlying data model.
  Transport Issues: If the query or the underlying objects were transported from one system to another, the aggregation level might not have been included in the transport.
  Data Model Changes: Changes in the data model (like changes in InfoObjects or InfoProviders) can lead to inconsistencies, causing the aggregation level to become invalid.
  
  Solution:
  
  Check Aggregation Levels: Verify that the aggregation level exists in the system. You can do this by navigating to the relevant InfoProvider and checking the available aggregation levels.
  Recreate the Aggregation Level: If the aggregation level is missing, you may need to recreate it. This can involve defining the aggregation level in the BW modeling tools.
  Adjust the Query: If the query is referencing an incorrect or outdated aggregation level, you may need to adjust the query definition to point to a valid aggregation level.
  Transport Check: If the issue arose after a transport, ensure that all necessary objects were included in the transport request. You may need to re-transport the missing objects.
  Check for Data Model Changes: Review any recent changes made to the data model that might have affected the aggregation levels. If changes were made, ensure that the queries are updated accordingly.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like RSA1 (Data Warehousing Workbench) to check the InfoProviders and aggregation levels.
  BW Modeling Tools: Use the BW Modeling Tools in Eclipse to manage and create aggregation levels.
  Query Designer: Use the Query Designer to check the query definition and ensure it is correctly set up.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or BW team for further investigation.