How To Fix /IWFND/CM_MGW_RT130 - Association with identical name as entity type '&1' already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_MGW_RT -

• Message number: 130

• Message text: Association with identical name as entity type '&1' already exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_MGW_RT130 - Association with identical name as entity type '&1' already exists ?

  The SAP error message /IWFND/CM_MGW_RT130 indicates that there is an issue with the definition of associations in your OData service. Specifically, it means that there is an attempt to create an association with a name that already exists for an entity type in your service. This can happen when you have multiple associations defined with the same name for the same entity type, which is not allowed.
  Cause:
  
  Duplicate Association Names: The most common cause of this error is that there are multiple associations defined in your OData model with the same name for the same entity type.
  Model Definition Issues: There may be issues in the way the OData model is defined, such as incorrect or duplicate entries in the metadata.
  Changes in the Data Model: If the data model has been modified (e.g., adding new associations) without properly updating the existing definitions, it can lead to conflicts.
  
  Solution:
  
  Check the OData Model: Review the OData service's metadata and check for any duplicate association names. Ensure that each association has a unique name within the context of its entity type.
  Modify Association Names: If you find duplicate association names, rename them to ensure uniqueness. This can be done in the service definition or the underlying data model.
  Regenerate the Service: After making changes to the associations, regenerate the OData service to ensure that the changes are reflected in the service metadata.
  Clear Cache: Sometimes, caching issues can cause this error to persist. Clear the cache of the OData service and any related components to ensure that the latest definitions are being used.
  Check for Inheritance: If you are using inheritance in your entity types, ensure that the associations are not conflicting due to inherited properties.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SEGW (Service Builder) to manage your OData services and check the model definitions.
  Debugging: If the issue persists, consider debugging the service to trace where the duplicate association is being defined.
  Documentation: Refer to SAP documentation on OData service development for best practices and guidelines on defining associations and entity types.
  
  By following these steps, you should be able to resolve the error and ensure that your OData service functions correctly without conflicts in association names.