How To Fix MD_ODATA003 - No entity was sent (other than the ETag entity)

SAP Error Message - Details

• Message type: E = Error

• Message class: MD_ODATA - Messages for master data oData services

• Message number: 003

• Message text: No entity was sent (other than the ETag entity)

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MD_ODATA003 - No entity was sent (other than the ETag entity) ?

  The SAP error message MD_ODATA003: No entity was sent (other than the ETag entity) typically occurs in the context of OData services when a request is made to an OData endpoint, but the server does not receive any valid entity data in the request body. This can happen in various scenarios, such as when trying to create or update an entity.
  Causes:
  
  Empty Request Body: The most common cause is that the request body is empty or does not contain the expected entity data.
  Incorrect Content-Type: The Content-Type header of the request may not be set correctly (e.g., it should be application/json for JSON payloads).
  Malformed JSON: If the request body is in JSON format, it may be malformed or not structured correctly according to the OData service's expectations.
  ETag Misconfiguration: If the request includes an ETag but does not include the entity data, the server may reject the request.
  Authorization Issues: Sometimes, authorization issues can lead to the server not processing the request correctly, resulting in this error.
  
  Solutions:
  
  Check Request Body: Ensure that the request body contains the necessary entity data. For create or update operations, the body should include all required fields.
  Set Correct Content-Type: Make sure that the Content-Type header is set to the appropriate value (e.g., application/json).
  Validate JSON Structure: If using JSON, validate the structure of the JSON payload to ensure it matches the expected format for the OData service.
  Review ETag Usage: If you are using ETags, ensure that you are sending the entity data along with the ETag. If you are only sending the ETag, the server will not process the request.
  Check Authorization: Verify that the user has the necessary permissions to perform the operation on the OData service.
  
  Related Information:
  
  OData Documentation: Refer to the official OData documentation for guidelines on how to structure requests and responses.
  SAP Notes: Check SAP Notes and Knowledge Base Articles for any known issues or patches related to the specific OData service you are using.
  Debugging Tools: Use tools like Postman or Fiddler to inspect the request and response, which can help identify issues with the request format or headers.
  SAP Community: Engage with the SAP Community forums for additional insights and solutions from other users who may have encountered similar issues.
  
  By addressing the above points, you should be able to resolve the MD_ODATA003 error and successfully interact with the OData service.