How To Fix APS_CKE_PARSER108 - Changing the aggregation of field &1 is incompatible.

SAP Error Message - Details

• Message type: E = Error

• Message class: APS_CKE_PARSER - CDS Key user tool - AST handler messages

• Message number: 108

• Message text: Changing the aggregation of field &1 is incompatible.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message APS_CKE_PARSER108 - Changing the aggregation of field &1 is incompatible. ?

  The SAP error message APS_CKE_PARSER108, which states "Changing the aggregation of field &1 is incompatible," typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when there is an attempt to change the aggregation type of a field in a query or data model that is not allowed due to existing dependencies or settings.
  Cause:
  
  
  Incompatible Aggregation Change: The error arises when you try to change the aggregation type of a field that is already being used in a way that does not support the new aggregation type. For example, changing a field from a sum aggregation to an average aggregation might not be compatible if the field is used in a context that requires summation.
  
  
  Existing Queries or Reports: If there are existing queries, reports, or data models that rely on the current aggregation setting, changing it can lead to inconsistencies or errors in those objects.
  
  
  Data Model Constraints: The underlying data model may have constraints that prevent changing the aggregation type of certain fields, especially if they are part of a key figure or are used in calculations.
  
  
  Solution:
  
  
  Review Dependencies: Check if the field is being used in any existing queries, reports, or calculations. If so, you may need to adjust those objects before changing the aggregation type.
  
  
  Change Aggregation in a Compatible Way: If you need to change the aggregation type, consider creating a new field with the desired aggregation instead of changing the existing one. This way, you can maintain the integrity of existing reports and queries.
  
  
  Check Data Model Settings: Review the data model settings and ensure that the field's aggregation type is compatible with its usage. You may need to consult the data model documentation or SAP support for specific guidelines.
  
  
  Testing: After making changes, thoroughly test the affected queries and reports to ensure that they function correctly with the new aggregation settings.
  
  
  Consult Documentation: Refer to SAP documentation or community forums for specific guidance related to your version of SAP BW or HANA, as there may be version-specific considerations.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Training and Documentation: Consider reviewing training materials or documentation related to SAP BW or HANA data modeling and query design to better understand aggregation settings and their implications.
  
  If the issue persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.