How To Fix /IWFND/CM_MGW312 - No Model assigned to Service '&1'; assign Model first

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_MGW -

• Message number: 312

• Message text: No Model assigned to Service '&1'; assign Model first

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_MGW312 - No Model assigned to Service '&1'; assign Model first ?

  The SAP error message /IWFND/CM_MGW312 No Model assigned to Service '&1'; assign Model first typically occurs in the context of SAP Gateway services, particularly when you are trying to activate or use an OData service that has not been properly configured with a data model.
  Cause:
  This error indicates that the OData service you are trying to use does not have an associated data model. In SAP Gateway, a service must be linked to a data model (which defines the structure of the data being exposed) in order to function correctly. If this link is missing, the system cannot process requests for that service, leading to the error message.
  Solution:
  To resolve this error, you need to assign a data model to the OData service. Here are the steps to do this:
  
  
  Access the Service Maintenance Transaction:
  
  Go to transaction code /IWFND/MAINT_SERVICE in the SAP GUI.
  
  
  
  Find the Service:
  
  In the Service Maintenance screen, search for the service that is causing the error (replace &1 with the actual service name).
  
  
  
  Assign a Model:
  
  If the service is not assigned to a model, you will need to assign it. Click on the "Add Service" button.
  In the dialog that appears, you will see options to select the service and the corresponding model. Make sure to select the appropriate model that corresponds to your service.
  
  
  
  Activate the Service:
  
  After assigning the model, ensure that the service is activated. You can do this by selecting the service and clicking on the "Activate" button.
  
  
  
  Check the Model Configuration:
  
  If you have created a new model or made changes to an existing one, ensure that it is correctly defined and activated in the relevant transaction (e.g., /IWFND/MAINT_SERVICE or /IWFND/SEMANTIC).
  
  
  
  Test the Service:
  
  After making the changes, test the service again to ensure that the error is resolved.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  /IWFND/MAINT_SERVICE: Service Maintenance for OData services.
  /IWFND/SEMANTIC: To manage semantic data models.
  
  
  
  Documentation:
  
  Refer to SAP Help documentation for OData services and SAP Gateway for detailed information on service configuration and troubleshooting.
  
  
  
  Debugging:
  
  If the issue persists after assigning the model, consider using transaction /IWFND/ERROR_LOG to check for additional error messages that may provide more context.
  
  
  
  By following these steps, you should be able to resolve the /IWFND/CM_MGW312 error and successfully assign a model to your OData service.