How To Fix /IWBEP/CM_V4_MED352 - Etag property '&1' (in '&2') must not have conversion exit for CP Model

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 352

• Message text: Etag property '&1' (in '&2') must not have conversion exit for CP Model

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED352 - Etag property '&1' (in '&2') must not have conversion exit for CP Model ?

  The SAP error message /IWBEP/CM_V4_MED352 indicates an issue related to the ETag property in the context of the OData service. Specifically, the error states that the ETag property must not have a conversion exit for the CP (Characteristic Profile) Model. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  ETag Property: The ETag is a mechanism used for versioning resources in OData services. It helps in managing concurrency and ensuring that clients are working with the latest version of a resource.
  Conversion Exit: In SAP, conversion exits are used to convert data between different formats. If an ETag property is defined with a conversion exit, it can lead to issues because ETags should represent a unique version of a resource without any transformation.
  Model Configuration: The error typically arises when the OData model is incorrectly configured, particularly when defining properties that are expected to be ETags.
  
  Solution:
  
  
  Check ETag Property Configuration:
  
  Go to the Data Model (e.g., in SEGW transaction) and check the properties defined for the entity that is causing the error.
  Ensure that the ETag property does not have any conversion exit assigned to it. If it does, remove the conversion exit.
  
  
  
  Adjust the Metadata:
  
  If you are using a custom OData service, ensure that the metadata definition for the ETag property is correct and does not include any conversion logic.
  You may need to regenerate the service or adjust the annotations in the metadata.
  
  
  
  Review the OData Service Implementation:
  
  If you have implemented custom logic in the OData service, review the implementation to ensure that the ETag handling is done correctly without conversion exits.
  
  
  
  Testing:
  
  After making the necessary changes, test the OData service again to ensure that the error is resolved.
  
  
  
  Related Information:
  
  OData Versioning: Understanding how ETags work in OData can help in managing resource versions effectively.
  SAP Gateway: Familiarize yourself with the SAP Gateway framework, as it provides the tools and methods for creating and managing OData services.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance on handling ETags in OData services.
  
  If the issue persists after following these steps, consider reaching out to SAP support or consulting the SAP community for further assistance.