/IWFND/MED195 - Tag '&1' does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/MED -

• Message number: 195

• Message text: Tag '&1' does not exist

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.

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AnswerBot

• What is the cause and solution for SAP error message /IWFND/MED195 - Tag '&1' does not exist ?

  The SAP error message /IWFND/MED195 Tag '&1' does not exist typically occurs in the context of SAP Gateway and OData services. This error indicates that the system is trying to access a tag (or entity) that is not defined or does not exist in the OData service metadata.
  Cause:
  
  Missing Tag Definition: The tag specified in the error message (&1) is not defined in the OData service's metadata. This could be due to a missing entity set or a typo in the request.
  Service Not Activated: The OData service might not be activated in the SAP Gateway.
  Incorrect URL: The URL used to access the OData service might be incorrect, leading to a request for a non-existent tag.
  Changes in Metadata: If there have been recent changes to the OData service (like adding or removing entities), the client might still be using an outdated version of the metadata.
  
  Solution:
  
  Check Metadata: Verify the OData service metadata to ensure that the tag you are trying to access is defined. You can access the metadata by appending $metadata to the service URL.
  Activate the Service: If the service is not activated, you can activate it using the SAP Gateway Service Builder (transaction code /IWFND/MAINT_SERVICE).
  Correct the URL: Ensure that the URL you are using to access the OData service is correct and matches the defined entity sets in the metadata.
  Refresh Client Cache: If you are using a client application, clear the cache or refresh the metadata to ensure it is up to date.
  Check for Changes: If there have been recent changes to the OData service, ensure that the client application is updated to reflect those changes.
  
  Related Information:
  
  Transaction Codes:
  
  /IWFND/MAINT_SERVICE: To maintain and activate OData services.
  /IWFND/GW_CLIENT: To test OData services and view their metadata.
  
  
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to OData services and this error message.
  Debugging: If you have access to the backend, you can debug the OData service to see where the error is being triggered.
  
  By following these steps, you should be able to identify the cause of the error and implement the appropriate solution.