How To Fix /IWBEP/CM_V4_MED134 - Ref. constr.: Nav. prop. '&1' in '&2' with different property types

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 134

• Message text: Ref. constr.: Nav. prop. '&1' in '&2' with different property types

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED134 - Ref. constr.: Nav. prop. '&1' in '&2' with different property types ?

  The SAP error message /IWBEP/CM_V4_MED134 typically occurs in the context of OData services when there is a mismatch in the property types of navigation properties in the data model. This error indicates that there is a reference constraint violation due to the navigation property having different types in the source and target entities.
  Cause:
  
  Mismatched Property Types: The navigation property defined in the source entity does not match the type of the corresponding property in the target entity. For example, if the source entity has a navigation property defined as an integer and the target entity has it defined as a string, this error will occur.
  Incorrect Metadata Definition: The metadata for the OData service may have been incorrectly defined, leading to inconsistencies in the property types.
  Changes in Data Model: If there have been recent changes to the data model (like adding or modifying properties), it may lead to inconsistencies if not properly updated across all related entities.
  
  Solution:
  
  Check Entity Definitions: Review the definitions of the entities involved in the navigation property. Ensure that the property types are consistent across both entities.
  Update Metadata: If there are discrepancies, update the metadata definitions in the OData service to ensure that the property types match.
  Regenerate OData Service: If you have made changes to the data model, regenerate the OData service to ensure that the changes are reflected correctly.
  Test the Service: After making the necessary changes, test the OData service to ensure that the error is resolved and that the navigation properties work as expected.
  
  Related Information:
  
  OData Services: Understanding how OData services work in SAP can help in troubleshooting such issues. Familiarize yourself with the concepts of entity types, navigation properties, and data model definitions.
  SAP Gateway: If you are using SAP Gateway, ensure that the service is properly configured and that the underlying data model is correctly defined.
  SAP Notes: Check for any relevant SAP Notes that may address similar issues or provide additional guidance on resolving this error.
  
  By following these steps, you should be able to identify and resolve the cause of the /IWBEP/CM_V4_MED134 error in your SAP environment.