How To Fix MPE_OAN107 - External element number &1 already used in OAN &2, version &3

SAP Error Message - Details

• Message type: E = Error

• Message class: MPE_OAN - Operation Activity Network Messages

• Message number: 107

• Message text: External element number &1 already used in OAN &2, version &3

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MPE_OAN107 - External element number &1 already used in OAN &2, version &3 ?

  The SAP error message MPE_OAN107 indicates that there is a conflict with an external element number that has already been used in a specific Object Assignment Number (OAN) and version. This typically occurs in the context of managing object assignments in SAP, particularly in modules related to asset management or project systems.
  Cause:
  The error is triggered when you attempt to assign an external element number that is already associated with another OAN in the system. This can happen due to:
  
  Duplicate entries being created inadvertently.
  Incorrect data migration or import processes that lead to conflicts.
  Manual entry errors where the same external element number is reused.
  
  Solution:
  To resolve the MPE_OAN107 error, you can take the following steps:
  
  
  Check Existing Assignments:
  
  Use transaction codes like OAN1 or OAN2 to review existing object assignments and their associated external element numbers.
  Identify the OAN and version that is currently using the external element number in question.
  
  
  
  Modify or Delete Conflicting Entries:
  
  If the external element number is indeed being used by another OAN, you may need to either modify the existing assignment or delete it if it is no longer needed.
  Ensure that you have the necessary authorizations to make these changes.
  
  
  
  Use a Unique External Element Number:
  
  If the external element number is required for a new assignment, consider using a different, unique number that does not conflict with existing entries.
  
  
  
  Data Consistency Check:
  
  Run consistency checks or validation reports to ensure that there are no other data integrity issues in the system that could lead to similar errors.
  
  
  
  Consult Documentation or Support:
  
  If the issue persists, refer to SAP documentation or consult with your SAP support team for further assistance. They may provide insights specific to your system configuration or version.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as OAN1 (Create Object Assignment), OAN2 (Change Object Assignment), and OAN3 (Display Object Assignment).
  SAP Notes: Check for any SAP Notes related to this error message for patches or updates that may address known issues.
  User Authorizations: Ensure that you have the appropriate authorizations to view and modify object assignments in the system.
  
  By following these steps, you should be able to resolve the MPE_OAN107 error and prevent it from occurring in the future.