How To Fix MM_IM_ODATA_API_MDOC021 - Assignment of Serial Number &1 to Material Document Item is missing

SAP Error Message - Details

• Message type: E = Error

• Message class: MM_IM_ODATA_API_MDOC - Messages for Material Document OData API

• Message number: 021

• Message text: Assignment of Serial Number &1 to Material Document Item is missing

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MM_IM_ODATA_API_MDOC021 - Assignment of Serial Number &1 to Material Document Item is missing ?

  The SAP error message MM_IM_ODATA_API_MDOC021 indicates that there is an issue with the assignment of a serial number to a material document item during an inventory management operation. This error typically occurs when you are trying to post a goods movement (like goods receipt or goods issue) for a material that requires serial number tracking, but the serial number has not been properly assigned or is missing.
  Cause:
  
  Missing Serial Number: The most common cause is that the serial number for the material document item is not provided or is not correctly assigned in the system.
  Incorrect Configuration: The material may be configured in such a way that it requires serial number tracking, but the necessary data is not being supplied during the transaction.
  Data Entry Error: There may be a mistake in the data entry process, where the serial number is either not entered or entered incorrectly.
  System Configuration: The system may not be configured to handle serial numbers correctly for the specific material or movement type.
  
  Solution:
  
  
  Check Serial Number Assignment:
  
  Ensure that the serial number is correctly assigned to the material document item. You can do this by checking the material master data and ensuring that the serial number is available and valid.
  If you are using an OData API, ensure that the payload includes the correct serial number for the item being processed.
  
  
  
  Review Material Master Settings:
  
  Go to the material master (transaction code MM03) and check the settings for the material in question. Ensure that the serial number management is activated if required.
  Check the "Serial Number" tab to see if the material is set to require serial numbers.
  
  
  
  Validate Input Data:
  
  If you are using a custom program or interface to post the goods movement, validate that the input data includes the serial number and that it is formatted correctly.
  Ensure that the serial number exists in the system and is not already assigned to another document.
  
  
  
  Check Movement Type Configuration:
  
  Review the configuration for the movement type being used to ensure that it is set up to handle serial numbers correctly.
  
  
  
  Use Transaction Codes:
  
  Use transaction codes like MB1A, MB1B, or MIGO to manually post the goods movement and see if the error persists. This can help isolate whether the issue is with the OData API or the underlying data.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for more detailed information on handling serial numbers and the specific error message.
  
  
  
  Related Information:
  
  Serial Number Management: Understand how serial number management works in SAP, including how to create, assign, and manage serial numbers.
  OData API Documentation: If you are using the OData API, refer to the API documentation for details on the required fields and data formats.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a technical consultant who can provide further assistance.