How To Fix ECATT_ODATA_TST073 - Response does not contain an ETag (operation &1: &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: ECATT_ODATA_TST - eCATT OData Testing - Messages

• Message number: 073

• Message text: Response does not contain an ETag (operation &1: &2)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message ECATT_ODATA_TST073 - Response does not contain an ETag (operation &1: &2) ?

  The SAP error message ECATT_ODATA_TST073 indicates that a response from an OData service does not contain an ETag. This can occur during automated testing with eCATT (extended Computer Aided Test Tool) when the system expects an ETag in the response for operations that involve data manipulation (like updates or deletes).
  Cause:
  
  Missing ETag in Response: The OData service being called does not return an ETag in its response. ETags are used for concurrency control and caching, and they should be included in the response for certain operations.
  Service Configuration: The OData service might not be configured to generate ETags. This can happen if the service is not set up to support versioning or if the underlying data model does not include ETag support.
  Incorrect HTTP Method: The operation being performed may not be appropriate for the resource being accessed, leading to a response that does not include an ETag.
  Service Implementation: The implementation of the OData service may have bugs or may not adhere to the OData protocol specifications.
  
  Solution:
  
  Check OData Service Implementation: Ensure that the OData service is correctly implemented to return ETags. This may involve reviewing the service code or configuration.
  Update Service Configuration: If the service is not configured to return ETags, you may need to modify the service definition to include ETag support.
  Review HTTP Methods: Ensure that the correct HTTP methods (GET, POST, PUT, DELETE) are being used for the operations. For example, a GET request should return an ETag in the response.
  Test with Different Clients: Use tools like Postman or SAP Gateway Client to test the OData service directly and check if the ETag is returned in the response.
  Consult Documentation: Review the OData service documentation to ensure that it is compliant with the expected standards and that ETags are supported.
  Contact Development Team: If you are not the developer of the OData service, reach out to the development team for assistance in troubleshooting the issue.
  
  Related Information:
  
  ETag: An ETag (Entity Tag) is a part of HTTP, used for web cache validation and conditional requests from browsers for resources.
  OData Protocol: OData (Open Data Protocol) is a standard protocol for building and consuming RESTful APIs. It allows for querying and updating data.
  eCATT: Extended Computer Aided Test Tool is a tool in SAP for automated testing of SAP applications.
  
  By addressing the above points, you should be able to resolve the error message ECATT_ODATA_TST073 and ensure that your OData service returns the expected ETag in its responses.