How To Fix /IWFND/CM_MGW_RT056 - Entity Type &1 not defined in Metadata

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_MGW_RT -

• Message number: 056

• Message text: Entity Type &1 not defined in Metadata

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_MGW_RT056 - Entity Type &1 not defined in Metadata ?

  The SAP error message /IWFND/CM_MGW_RT056 Entity Type &1 not defined in Metadata typically occurs in the context of SAP Gateway services when the requested entity type is not defined in the service's metadata. This can happen for various reasons, such as misconfiguration, missing definitions, or issues with the service registration.
  Cause:
  
  Entity Type Not Defined: The entity type specified in the request is not defined in the OData service's metadata.
  Service Registration Issues: The OData service may not be properly registered or activated in the SAP Gateway.
  Model Changes: Changes made to the underlying data model (like adding or removing entity types) without updating the service.
  Namespace Issues: The entity type might be defined in a different namespace than expected.
  Service Versioning: If you are using a specific version of the service, the entity type may not exist in that version.
  
  Solution:
  
  
  Check Metadata: Use the /IWFND/MAINT_SERVICE transaction to check if the service is correctly registered and activated. You can also access the service's metadata directly via the URL (e.g., http://<host>:<port>/sap/opu/odata/sap/<service_name>/$metadata) to verify if the entity type is defined.
  
  
  Update Service: If the entity type is missing, you may need to regenerate the service. This can be done by:
  
  Going to the transaction /IWFND/MAINT_SERVICE.
  Selecting the service and clicking on "Regenerate".
  
  
  
  Check Data Model: Ensure that the data model (e.g., CDS views, database tables) that the OData service is based on is correctly defined and activated.
  
  
  Namespace Verification: Ensure that the entity type is being referenced with the correct namespace. If the entity type is defined in a different namespace, you need to adjust your request accordingly.
  
  
  Service Version: If you are using a specific version of the service, ensure that the entity type exists in that version. You may need to check the service's versioning and update your request if necessary.
  
  
  Clear Cache: Sometimes, clearing the cache can resolve issues related to outdated metadata. You can do this by using the transaction /IWFND/CACHE to clear the cache for the OData service.
  
  
  Related Information:
  
  
  Transaction Codes:
  
  /IWFND/MAINT_SERVICE: Manage OData services.
  /IWFND/CACHE: Clear OData service cache.
  
  
  
  OData Service Testing: You can use tools like Postman or the SAP Gateway Client (transaction /IWFND/GW_CLIENT) to test the OData service and check the responses.
  
  
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to your version of SAP Gateway or the OData service.
  
  
  By following these steps, you should be able to identify the cause of the error and implement the appropriate solution.