How To Fix /IWBEP/CM_MGW_RT224 - Entity Type '&1': Technical ETag must not be combined with other ETag

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_RT -

• Message number: 224

• Message text: Entity Type '&1': Technical ETag must not be combined with other ETag

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_RT224 - Entity Type '&1': Technical ETag must not be combined with other ETag ?

  The SAP error message /IWBEP/CM_MGW_RT224 indicates that there is an issue with the handling of ETags in an OData service. Specifically, the error message states that a technical ETag must not be combined with other ETags for the specified entity type.
  Cause:
  This error typically occurs when there is a conflict in the way ETags are being managed in the OData service. ETags are used for concurrency control and caching in OData services. The technical ETag is a system-generated value that is used to track changes to an entity. If the service is trying to combine a technical ETag with other ETags (for example, custom ETags or those generated by the application), it leads to this error.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check ETag Configuration: Review the configuration of your OData service to ensure that you are not mixing technical ETags with custom ETags. Make sure that the service is set up to use either one or the other, but not both.
  
  
  Review Entity Type Implementation: Look at the implementation of the entity type in question. Ensure that the ETag handling logic is correctly implemented and that it adheres to the OData standards.
  
  
  Debugging: If you have access to the backend code, you can debug the OData service to see how ETags are being generated and returned. Look for any custom logic that might be combining ETags incorrectly.
  
  
  Update Service: If you have made changes to the entity type or the way ETags are handled, make sure to regenerate and activate the OData service to apply the changes.
  
  
  Consult Documentation: Refer to the SAP documentation for OData services and ETag handling to ensure that you are following best practices.
  
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide guidance on ETag handling in OData services.
  
  
  Related Information:
  
  ETag: An ETag (Entity Tag) is a unique identifier assigned to a specific version of a resource. It is used in HTTP to determine if a resource has changed.
  OData Services: OData (Open Data Protocol) is a standard protocol for building and consuming RESTful APIs. It allows for querying and updating data using standard HTTP protocols.
  Concurrency Control: ETags are often used in scenarios where multiple clients may be trying to update the same resource simultaneously, helping to prevent conflicts.
  
  By following these steps and understanding the context of the error, you should be able to resolve the issue related to the ETag handling in your SAP OData service.