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

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_RT -

• Message number: 130

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

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

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

  The SAP error message /IWBEP/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 the specified entity type. This can occur in the context of SAP Gateway and OData services when there are duplicate definitions or misconfigurations in the service metadata.
  Cause:
  
  Duplicate Association Definition: The most common cause is that there are multiple associations defined with the same name for the same entity type in the service's metadata.
  Incorrect Model Configuration: There may be issues in the way the data model is defined, leading to conflicts in association names.
  Service Re-Registration: If the service has been re-registered or modified without proper adjustments, it may lead to conflicts in the metadata.
  
  Solution:
  
  Check the Data Model: Review the data model definitions in your OData service. Look for any duplicate association names and ensure that each association is uniquely defined.
  Modify Association Names: If you find duplicate associations, modify the names of the associations to ensure they are unique.
  Regenerate the Service: After making changes to the data model, regenerate the OData service. This can often be done through transaction /IWFND/MAINT_SERVICE in the SAP GUI.
  Clear Cache: Clear the cache of the OData service to ensure that the changes take effect. You can do this using transaction /IWFND/CACHE or by using the relevant options in the SAP Gateway.
  Check for Inheritance: If you are using inheritance in your data model, ensure that the associations are correctly defined in the parent and child entities to avoid conflicts.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /IWFND/MAINT_SERVICE for service maintenance and /IWFND/CACHE for cache management.
  SAP Gateway Documentation: Refer to the official SAP Gateway documentation for best practices on defining OData services and managing associations.
  Debugging: If the issue persists, consider using debugging tools to trace the service execution and identify where the duplicate association is being defined.
  
  By following these steps, you should be able to resolve the error message /IWBEP/CM_MGW_RT130 and ensure that your OData service functions correctly.