How To Fix /IWBEP/CM_V4_MED359 - Only entity type '&1' is allowed to use complex type '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 359

• Message text: Only entity type '&1' is allowed to use complex type '&2'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED359 - Only entity type '&1' is allowed to use complex type '&2' ?

  The SAP error message /IWBEP/CM_V4_MED359 indicates that there is a restriction on the use of complex types in your OData service. Specifically, it states that only a certain entity type (denoted as &1) is allowed to use the specified complex type (denoted as &2). This error typically arises in the context of OData services when there is a mismatch between the entity types and the complex types defined in your service metadata.
  Cause:
  
  Incorrect Mapping: The complex type is being used in an entity type where it is not allowed. Each complex type can only be associated with specific entity types as defined in the OData service metadata.
  Service Definition Issues: The service definition may not correctly reflect the relationships between entity types and complex types.
  Model Configuration: There may be issues in the way the OData model is configured, leading to the complex type being incorrectly referenced.
  
  Solution:
  
  
  Check Entity and Complex Type Definitions:
  
  Review the definitions of the entity types and complex types in your OData service. Ensure that the complex type is only being used in the entity type that is allowed to use it.
  You can do this by checking the service metadata (usually accessible via the service URL with $metadata).
  
  
  
  Adjust the Service Implementation:
  
  If you are using a complex type in an entity type that is not allowed, you will need to either remove the complex type from that entity or change the entity type to one that is allowed to use the complex type.
  
  
  
  Update the Data Model:
  
  If you are using a data model (like CDS views or similar), ensure that the associations and compositions are correctly defined. You may need to adjust the model to ensure that the complex type is only used where permitted.
  
  
  
  Regenerate the Service:
  
  After making changes to the definitions, regenerate the OData service to ensure that the changes are reflected in the service metadata.
  
  
  
  Testing:
  
  After making the necessary adjustments, test the OData service again to ensure that the error is resolved.
  
  
  
  Related Information:
  
  OData Documentation: Familiarize yourself with the OData specifications regarding entity types and complex types. This can help you understand the limitations and rules governing their usage.
  SAP Notes: Check for any relevant SAP Notes or documentation that may provide additional context or solutions for this specific error.
  Debugging Tools: Use debugging tools available in SAP (like transaction codes SE80, SE11, or SE37) to analyze the service implementation and identify where the issue lies.
  
  By following these steps, you should be able to resolve the error and ensure that your OData service functions correctly.