How To Fix /IWFND/CM_MGW058 - Navigation property '&1' not supported for '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_MGW -

• Message number: 058

• Message text: Navigation property '&1' not supported for '&2'

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_MGW058 - Navigation property '&1' not supported for '&2' ?

  The SAP error message /IWFND/CM_MGW058 Navigation property '&1' not supported for '&2' typically occurs in the context of SAP Gateway and OData services. This error indicates that there is an attempt to access a navigation property that is not supported or not properly defined in the OData service.
  Cause:
  
  Missing Navigation Property: The navigation property specified in the error message (&1) is not defined in the entity type (&2) of the OData service.
  Incorrect Entity Set: The navigation property may be defined, but it is not applicable to the entity set being accessed.
  Service Metadata Issues: The OData service metadata might not be correctly configured or might not reflect the current state of the underlying data model.
  Authorization Issues: Sometimes, the user might not have the necessary authorizations to access certain navigation properties.
  
  Solution:
  
  Check Metadata: Verify the OData service metadata to ensure that the navigation property is defined for the entity type. You can access the metadata by appending $metadata to the service URL.
  Update Service: If the navigation property is missing, you may need to update the OData service definition in the SAP Gateway Service Builder (transaction code SEGW) to include the navigation property.
  Regenerate Service: After making changes in the Service Builder, regenerate the service and activate it to ensure that the changes take effect.
  Check Entity Set: Ensure that you are accessing the correct entity set that supports the navigation property.
  Authorization Check: Verify that the user has the necessary authorizations to access the navigation property. This can be done by checking the roles and authorizations assigned to the user.
  Debugging: If the issue persists, consider debugging the OData service to trace the request and identify where the navigation property is being accessed incorrectly.
  
  Related Information:
  
  SAP Gateway: The SAP Gateway is a technology that allows you to connect devices and applications to SAP systems via OData services.
  OData Services: OData (Open Data Protocol) is a standard protocol for building and consuming RESTful APIs. In SAP, OData services are used to expose business data and logic.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SEGW (Service Builder), /IWFND/MAINT_SERVICE (Manage Services), and /IWFND/GW_CLIENT (Gateway Client) for testing OData services.
  
  By following these steps, you should be able to resolve the error and ensure that the navigation properties are correctly defined and accessible in your OData service.