How To Fix /IWBEP/CM_MGW_GENER037 - Type class '&1' must be sub class of '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_GENER -

• Message number: 037

• Message text: Type class '&1' must be sub class of '&2'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_MGW_GENER037 - Type class '&1' must be sub class of '&2' ?

  The SAP error message /IWBEP/CM_MGW_GENER037 indicates that there is a problem with the type class definition in your OData service. Specifically, it states that the type class you are trying to use (denoted as &1) must be a subclass of another type class (denoted as &2). This typically occurs in the context of defining or generating OData services in SAP Gateway.
  Cause:
  
  Incorrect Type Definition: The type class you are trying to use is not correctly defined as a subclass of the required parent class. This can happen if the class hierarchy is not properly set up.
  Model Configuration Issues: There may be issues in the data model configuration where the relationships between the classes are not correctly established.
  Inconsistent Metadata: The metadata definitions for the OData service may not align with the actual class definitions in the ABAP backend.
  
  Solution:
  
  Check Class Hierarchy: Verify that the class you are trying to use (&1) is indeed a subclass of the required class (&2). You can do this by checking the class definitions in the ABAP Workbench (transaction SE80 or SE24).
  Adjust Class Definitions: If the class is not a subclass, you may need to either change the class definition to inherit from the correct parent class or adjust your OData service to use the correct class.
  Regenerate the OData Service: After making changes to the class definitions, regenerate the OData service to ensure that the changes are reflected in the service metadata.
  Check Service Metadata: Use transaction /IWFND/MAINT_SERVICE to check the service metadata and ensure that it is correctly configured.
  Debugging: If the issue persists, consider debugging the OData service generation process to identify where the mismatch is occurring.
  
  Related Information:
  
  Transaction Codes: 
  
  SE80: Object Navigator
  SE24: Class Builder
  /IWFND/MAINT_SERVICE: OData Service Maintenance
  
  
  Documentation: Refer to SAP Help documentation for OData services and class definitions for more detailed guidance on class hierarchies and OData service configuration.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance on this error message.
  
  By following these steps, you should be able to resolve the error and ensure that your OData service is correctly configured.