How To Fix MPE_OAN128 - OAN header has incomplete key

SAP Error Message - Details

• Message type: E = Error

• Message class: MPE_OAN - Operation Activity Network Messages

• Message number: 128

• Message text: OAN header has incomplete key

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MPE_OAN128 - OAN header has incomplete key ?

  The SAP error message MPE_OAN128 indicates that there is an issue with the OAN (Order Acknowledgment Notification) header, specifically that it has an incomplete key. This error typically arises in the context of processing order acknowledgments in SAP, particularly when dealing with EDI (Electronic Data Interchange) or similar interfaces.
  Cause:
  The error usually occurs due to one or more of the following reasons:
  
  Missing Key Fields: The OAN header is expected to have certain key fields populated, and if any of these fields are missing or incomplete, the system will throw this error.
  Incorrect Mapping: If the data being sent to SAP is not correctly mapped to the expected fields in the OAN header, it can lead to incomplete keys.
  Data Format Issues: The data format being sent may not conform to the expected structure, leading to parsing errors.
  Configuration Issues: There may be configuration issues in the EDI settings or in the way the OAN is set up in the system.
  
  Solution:
  To resolve the MPE_OAN128 error, you can take the following steps:
  
  
  Check Key Fields: Review the OAN header data to ensure that all required key fields are populated. Common key fields include:
  
  Order Number
  Customer Number
  Item Number
  Delivery Date
  
  
  
  Review Mapping: If you are using an EDI interface, check the mapping configuration to ensure that the data being sent matches the expected fields in SAP.
  
  
  Validate Data Format: Ensure that the data being sent adheres to the expected format. This includes checking for correct data types, lengths, and any required delimiters.
  
  
  Debugging: If you have access to debugging tools, you can trace the process to identify where the data is being lost or incorrectly formatted.
  
  
  Consult Documentation: Refer to SAP documentation or the specific EDI guidelines for the OAN to ensure compliance with the expected structure.
  
  
  Contact Support: If the issue persists after checking the above points, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  
  Related Information:
  
  Transaction Codes: You may want to check relevant transaction codes such as WE02 (for monitoring IDocs) or WE19 (for testing IDocs) to analyze the incoming data.
  SAP Notes: Look for SAP Notes related to OAN processing or the specific error message for any known issues or patches.
  EDI Configuration: Review the EDI configuration settings in transaction WE20 to ensure that the partner profiles are correctly set up.
  
  By following these steps, you should be able to identify and resolve the cause of the MPE_OAN128 error in your SAP system.