How To Fix /IWBEP/CM_EQ021 - Query '&1' has hierarchy annotations that are not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_EQ -

• Message number: 021

• Message text: Query '&1' has hierarchy annotations that are not supported

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_EQ021 - Query '&1' has hierarchy annotations that are not supported ?

  The SAP error message /IWBEP/CM_EQ021 indicates that there are hierarchy annotations in a query that are not supported. This typically occurs in the context of OData services, particularly when using SAP Gateway or SAP S/4HANA.
  Cause:
  
  Unsupported Hierarchy Annotations: The query you are trying to execute has hierarchy annotations that are not supported by the OData service or the underlying data model. This can happen if the annotations are not properly defined or if the service does not support the specific hierarchy features you are trying to use.
  Incompatibility with OData Version: The version of OData being used may not support certain hierarchy features. For example, OData V2 and V4 have different capabilities regarding hierarchy annotations.
  Model Configuration Issues: There may be issues in the way the data model is configured, such as missing or incorrectly defined associations or navigation properties.
  
  Solution:
  
  Review Hierarchy Annotations: Check the annotations defined in your query. Ensure that they are supported by the OData service you are using. You may need to remove or modify unsupported annotations.
  Update OData Service: If you are using an older version of the OData service, consider updating it to a version that supports the required hierarchy annotations.
  Check Data Model: Review the underlying data model for any inconsistencies or missing definitions. Ensure that all necessary associations and navigation properties are correctly defined.
  Consult Documentation: Refer to the SAP documentation for the specific version of the OData service you are using to understand the supported features and limitations regarding hierarchy annotations.
  Debugging: Use transaction codes like /IWFND/ERROR_LOG to check for additional error details that may provide more context on the issue.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on hierarchy annotations in OData services.
  OData Documentation: Review the official OData documentation for details on hierarchy annotations and their support in different OData versions.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.