How To Fix RS_MAPI_JSON129 - Additional property error "&2" at &1

SAP Error Message - Details

• Message type: E = Error

• Message class: RS_MAPI_JSON - Generic JSON schema messages

• Message number: 129

• Message text: Additional property error "&2" at &1

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 RS_MAPI_JSON129 - Additional property error "&2" at &1 ?

  The SAP error message RS_MAPI_JSON129, which indicates an "Additional property error," typically arises when there is an issue with the JSON structure being processed in the SAP system. This error suggests that there is an unexpected or unrecognized property in the JSON data being sent or received.
  Cause:
  
  Invalid JSON Structure: The JSON data may contain properties that are not defined in the expected schema. This can happen if the data being sent includes additional fields that are not recognized by the receiving system.
  Mismatch in Data Model: The data model in the SAP system may have changed, and the JSON being sent does not conform to the new structure.
  Configuration Issues: There may be configuration issues in the SAP system that lead to the system not recognizing certain properties in the JSON.
  
  Solution:
  
  Validate JSON Structure: Check the JSON data being sent or received. Ensure that it adheres to the expected schema and does not contain any additional properties that are not defined.
  Update Data Model: If there have been changes to the data model, update the JSON structure accordingly to match the new definitions.
  Check API Documentation: Refer to the API documentation for the specific service you are using to ensure that you are sending the correct properties and that they are formatted correctly.
  Debugging: Use debugging tools to trace the data flow and identify where the additional properties are being introduced. This can help pinpoint the source of the error.
  Consult SAP Notes: Check the SAP Support Portal for any relevant notes or updates regarding this error message. There may be patches or updates that address this issue.
  
  Related Information:
  
  SAP API Management: If you are using SAP API Management, ensure that the API definitions are correctly set up and that the JSON schema is properly defined.
  Error Handling: Implement error handling in your application to gracefully manage such errors and provide meaningful feedback to users or logs for further analysis.
  Testing: Use tools like Postman or similar to test the API calls with the expected JSON structure to ensure that the issue is not with the client-side implementation.
  
  By following these steps, you should be able to identify and resolve the cause of the RS_MAPI_JSON129 error in your SAP environment.