How To Fix /IWFND/CM_MGW_RT163 - Tag '&1' already exists. Application programming error

/IWFND/CM_MGW_RT163 - Overview

• Message type: E = Error

• Message class: /IWFND/CM_MGW_RT -

• Message number: 163

• Message text: Tag '&1' already exists. Application programming error

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.

/IWFND/CM_MGW_RT163 - Details

• The SAP error message /IWFND/CM_MGW_RT163 with the description "Tag '&1' already exists. Application programming error" typically occurs in the context of SAP Gateway and OData services. This error indicates that there is a conflict with the tags being used in your OData service, specifically that a tag with the same name has already been defined.
  
  Cause:
  
  Duplicate Tags: The most common cause of this error is that the same tag is being defined multiple times in the service metadata or in the implementation of the OData service.
  Incorrect Annotations: If you are using annotations in your service, there may be a conflict in the way they are defined.
  Service Implementation Issues: There may be issues in the implementation of the service, such as incorrect handling of entity sets or navigation properties.
  
  
  Solution:
  
  
  Check for Duplicate Tags: Review the metadata of your OData service to identify if the tag mentioned in the error message is defined more