How To Fix MPE_OAN123 - Relationship between element &1 and &2 in OAN &3, version &4 is unknown

SAP Error Message - Details

• Message type: E = Error

• Message class: MPE_OAN - Operation Activity Network Messages

• Message number: 123

• Message text: Relationship between element &1 and &2 in OAN &3, version &4 is unknown

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 MPE_OAN123 - Relationship between element &1 and &2 in OAN &3, version &4 is unknown ?

  The SAP error message MPE_OAN123 indicates that there is an issue with the relationship between two elements in an Object Assignment Number (OAN) in a specific version. This error typically arises in the context of SAP Master Data Management or when dealing with object relationships in SAP systems.
  Cause:
  
  Missing Relationship Definition: The relationship between the specified elements (e.g., objects, entities) is not defined in the system.
  Incorrect Configuration: The configuration for the OAN or the version may be incorrect or incomplete.
  Data Integrity Issues: There may be inconsistencies or missing data in the master data records that are supposed to define the relationship.
  Versioning Issues: The version specified may not be active or may not have the necessary relationships defined.
  
  Solution:
  
  Check Relationship Definitions: Verify that the relationship between the specified elements is defined in the system. You may need to create or update the relationship in the relevant configuration settings.
  Review OAN Configuration: Ensure that the Object Assignment Number (OAN) configuration is correct and that all necessary relationships are properly set up.
  Data Validation: Check the master data records for the elements involved to ensure that they are complete and correctly defined.
  Version Check: Confirm that the version specified in the error message is active and has the necessary relationships defined. If not, consider using a different version or updating the current one.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on managing relationships in your version of SAP.
  
  Related Information:
  
  Transaction Codes: You may need to use specific transaction codes (like SE11 for data dictionary, or customizing transactions) to check and modify the relevant configurations.
  SAP Notes: Look for SAP Notes related to this error message for any patches or updates that may address known issues.
  Support: If the issue persists, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  By following these steps, you should be able to identify and resolve the cause of the MPE_OAN123 error message in your SAP system.