How To Fix /IWFND/CM_MGW537 - eTag handling not supported for http method '&1'

/IWFND/CM_MGW537 - Overview

• Message type: E = Error

• Message class: /IWFND/CM_MGW -

• Message number: 537

• Message text: eTag handling not supported for http method '&1'

Self-Explanatory Message

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/IWFND/CM_MGW537 - Details

• The SAP error message /IWFND/CM_MGW537 eTag handling not supported for http method '&1' typically occurs in the context of SAP Gateway services when there is an issue with the handling of eTags for specific HTTP methods. This error indicates that the eTag functionality, which is used for caching and managing resource versions, is not supported for the HTTP method being used in the request.
  
  Cause:
  The error is caused by the following scenarios:
  
  Unsupported HTTP Method: The HTTP method being used (e.g., POST, PUT, DELETE) does not support eTag handling. eTags are generally used with GET requests to manage caching and conditional requests.
  Service Configuration: The OData service may not be configured to handle eTags for the specific operation being performed.
  Incorrect Client Implementation: The client making the request may be incorrectly attempting to use eTags with an unsupported method.
  
  
  Solution:
  To resolve this error, consider the following steps:
  
  
  Check HTTP Method: Ensure that you are using the