How To Fix /IWBEP/CM_V4_COS026 - Filter without a primitive property is not supported for select options

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_COS -

• Message number: 026

• Message text: Filter without a primitive property is not supported for select options

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_COS026 - Filter without a primitive property is not supported for select options ?

  The SAP error message /IWBEP/CM_V4_COS026 Filter without a primitive property is not supported for select options typically occurs in the context of OData services when a filter is applied to a property that is not a primitive type (like string, integer, etc.). This error indicates that the OData service is trying to process a filter that does not conform to the expected structure, particularly when it comes to select options.
  Cause:
  
  Non-Primitive Property: The filter is being applied to a complex type or a navigation property instead of a primitive property. OData services expect filters to be applied to primitive properties.
  Incorrect Query Structure: The query sent to the OData service may be incorrectly structured, leading to the service not being able to interpret the filter correctly.
  Service Definition Issues: There may be issues in the OData service definition, such as incorrect metadata or model definitions that do not properly expose the properties.
  
  Solution:
  
  
  Check the Filter: Review the filter being applied in the OData query. Ensure that it is targeting a primitive property. If you are trying to filter on a complex type, you may need to adjust your query to filter on a property of that complex type instead.
  
  
  Modify the Query: If you are using a client application to send the OData request, modify the query to ensure that it only includes filters on primitive properties. For example, instead of filtering on a complex type, filter on a specific field within that type.
  
  
  Review OData Service Metadata: Check the metadata of the OData service to understand the structure of the entities and their properties. Ensure that the properties you are trying to filter on are indeed primitive types.
  
  
  Update Service Implementation: If you have control over the OData service implementation, ensure that the service is correctly exposing the properties and that the model is defined properly.
  
  
  Testing: After making changes, test the OData query again to ensure that the error is resolved.
  
  
  Related Information:
  
  OData Documentation: Familiarize yourself with the OData protocol and its filtering capabilities. The official OData documentation can provide insights into how to structure queries correctly.
  SAP Notes: Check for any relevant SAP Notes or documentation that may address this specific error or provide guidance on best practices for OData service implementation.
  Debugging Tools: Use tools like SAP Gateway Client or Postman to test your OData queries and see the raw responses from the service, which can help in diagnosing issues.
  
  By following these steps, you should be able to resolve the error and successfully apply filters in your OData queries.