How To Fix MM_PUR_COMMON_API004 - Only PATCH operations supported in change set

SAP Error Message - Details

• Message type: E = Error

• Message class: MM_PUR_COMMON_API - Common messages for MM-PUR APIs

• Message number: 004

• Message text: Only PATCH operations supported in change set

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MM_PUR_COMMON_API004 - Only PATCH operations supported in change set ?

  The SAP error message MM_PUR_COMMON_API004: Only PATCH operations supported in change set typically occurs when there is an attempt to perform an operation that is not allowed in the context of a change set in the SAP system, particularly when using the OData services for managing purchase orders or related entities.
  Cause:
  
  
  Incorrect HTTP Method: The error indicates that the operation being attempted is not a PATCH operation. In OData, a PATCH request is used to update an existing resource, while POST is used to create a new resource, and DELETE is used to remove a resource. If you are trying to perform an operation that is not a PATCH (like POST or PUT) within a change set, this error will occur.
  
  
  Change Set Misconfiguration: If you are using a change set to group multiple operations together, and one of those operations is not a PATCH, the system will throw this error.
  
  
  Service Limitations: The OData service you are using may have specific limitations on what operations can be performed in a change set.
  
  
  Solution:
  
  
  Use the Correct HTTP Method: Ensure that you are using the PATCH method for updates. If you are trying to create a new resource, use POST outside of the change set.
  
  
  Review Change Set Usage: If you are using a change set, make sure that all operations within that change set are valid PATCH operations. If you need to perform different types of operations (like POST or DELETE), separate them into different requests.
  
  
  Check OData Service Documentation: Review the documentation for the specific OData service you are using to understand the supported operations and any limitations regarding change sets.
  
  
  Debugging: If you are unsure which operation is causing the issue, you can log the requests being sent to the server and check the HTTP methods being used.
  
  
  Related Information:
  
  OData Protocol: Understanding the OData protocol and its operations (GET, POST, PATCH, DELETE) is crucial for working with SAP services.
  SAP Gateway: Familiarize yourself with SAP Gateway and how it handles OData services, including change sets.
  SAP Notes and Documentation: Check for any relevant SAP Notes or documentation that may provide additional context or updates regarding this error message.
  
  By ensuring that you are using the correct operations and understanding the limitations of the OData service, you can resolve the MM_PUR_COMMON_API004 error effectively.