How To Fix /IWBEP/CM_V4_MED106 - Partner nav-prop '&1' not found for nav-prop '&2' in entity type '&3

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 106

• Message text: Partner nav-prop '&1' not found for nav-prop '&2' in entity type '&3

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED106 - Partner nav-prop '&1' not found for nav-prop '&2' in entity type '&3 ?

  The SAP error message /IWBEP/CM_V4_MED106 indicates that there is an issue with navigation properties in an OData service. Specifically, the error message states that a partner navigation property (&1) could not be found for another navigation property (&2) in a specified entity type (&3). 
  Cause:
  This error typically arises due to one of the following reasons:
  
  
  Incorrect Configuration: The navigation properties defined in the OData model may not be correctly configured. This could be due to missing or incorrectly defined associations between entity types.
  
  
  Model Inconsistencies: There may be inconsistencies in the metadata of the OData service, such as missing entity sets or relationships.
  
  
  Code Issues: If the OData service is generated from ABAP code, there may be issues in the underlying ABAP code that defines the entity types and their relationships.
  
  
  Service Activation: The OData service may not be properly activated or may not have the latest changes reflected.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Navigation Properties: Review the navigation properties defined in your OData model. Ensure that the partner navigation properties are correctly defined and that the associations between the entity types are properly set up.
  
  
  Review Metadata: Use the OData service's metadata endpoint (usually accessible via /$metadata) to inspect the entity types and their relationships. Look for the navigation properties and ensure they are correctly defined.
  
  
  Update and Activate Service: If you have made changes to the underlying ABAP code or the OData model, ensure that you regenerate and activate the OData service. You can do this using transaction /IWFND/MAINT_SERVICE in SAP.
  
  
  Check for Errors in Code: If the OData service is generated from ABAP code, check for any errors or inconsistencies in the code that defines the entity types and their relationships.
  
  
  Debugging: If the issue persists, consider debugging the OData service to trace where the error occurs. This may provide additional insights into what is causing the navigation property to not be found.
  
  
  Related Information:
  
  OData Services: Understanding how OData services work in SAP, including the concepts of entity types, navigation properties, and associations, can help in troubleshooting these types of errors.
  SAP Gateway: Familiarize yourself with the SAP Gateway framework, as it is responsible for exposing OData services in SAP.
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific error message or OData service you are working with.
  
  By following these steps, you should be able to identify and resolve the issue causing the /IWBEP/CM_V4_MED106 error message.