How To Fix /IWBEP/CM_MGW_RT018 - eTag handling for function import not implemented by provider application

/IWBEP/CM_MGW_RT018 - Overview

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_RT -

• Message number: 018

• Message text: eTag handling for function import not implemented by provider application

Self-Explanatory Message

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/IWBEP/CM_MGW_RT018 - Details

• The SAP error message /IWBEP/CM_MGW_RT018 indicates that there is an issue with eTag handling for a function import in an OData service. This error typically arises when the OData service is expected to support eTag functionality, but the underlying provider application (such as an ABAP backend) has not implemented it for the specific function import.
  
  Cause:
  
  Missing Implementation: The function import in the OData service is not implemented to handle eTags. eTags are used for concurrency control and caching, and if the function import does not support them, this error will occur.
  
  Configuration Issues: There may be configuration issues in the OData service or the backend system that prevent proper handling of eTags.
  Service Definition: The OData service definition may not correctly specify that the function import should support eTags.
  
  
  Solution:
  
  
  Implement eTag Handling: 
  
  If you are the developer of the backend service, you need to implement the logic to handle eTags for the specific function