How To Fix /IWBEP/CM_CP127 - Not supported: More than one inheritance levels for entity type '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_CP -

• Message number: 127

• Message text: Not supported: More than one inheritance levels for entity type '&1'

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_CP127 - Not supported: More than one inheritance levels for entity type '&1' ?

  The SAP error message /IWBEP/CM_CP127 Not supported: More than one inheritance levels for entity type '&1' typically occurs in the context of SAP Gateway and OData services when there is an issue with the way entity types are defined in the data model, particularly with inheritance.
  Cause:
  This error indicates that the OData service is trying to handle an entity type that has more than one level of inheritance. In OData, the service can only support a single level of inheritance for entity types. If your data model has a hierarchy where an entity type inherits from another entity type, which in turn inherits from yet another entity type, this will trigger the error.
  Solution:
  To resolve this issue, you can take the following steps:
  
  
  Review Entity Types: Check the entity types in your data model. Identify any entity types that have multiple levels of inheritance.
  
  
  Flatten the Hierarchy: If possible, refactor your data model to flatten the inheritance structure. This may involve creating a single entity type that combines the properties of the inherited types or redesigning the model to avoid deep inheritance.
  
  
  Use Composition Instead of Inheritance: If your design allows, consider using composition instead of inheritance. This means that instead of having one entity inherit from another, you can have entities that contain other entities as properties.
  
  
  Check Service Implementation: Ensure that the OData service implementation does not attempt to expose entity types with multiple inheritance levels. You may need to adjust the service definition or the way entities are exposed.
  
  
  Test Changes: After making changes to the data model or service implementation, test the OData service to ensure that the error no longer occurs.
  
  
  Related Information:
  
  SAP Gateway: This is the technology that allows you to create OData services in SAP. Understanding how it handles entity types and inheritance is crucial.
  OData Protocol: Familiarize yourself with the OData protocol and its limitations regarding entity inheritance.
  SAP Notes and Documentation: Check SAP Notes for any specific guidance or updates related to this error message. The SAP Help Portal may also have relevant documentation.
  
  By addressing the structure of your entity types and ensuring compliance with OData's limitations, you should be able to resolve the error and successfully implement your OData service.