How To Fix /SAPAPO/PPM_MAINTAIN518 - Activity &1 &2 is its own successor

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/PPM_MAINTAIN -

• Message number: 518

• Message text: Activity &1 &2 is its own successor

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/PPM_MAINTAIN518 - Activity &1 &2 is its own successor ?

  The SAP error message /SAPAPO/PPM_MAINTAIN518 Activity &1 &2 is its own successor typically occurs in the context of SAP Advanced Planning and Optimization (APO), particularly when dealing with the Project Portfolio Management (PPM) module. This error indicates that there is a circular dependency in the activity relationships within a project or planning scenario. Specifically, it means that an activity is set as its own successor, which is not allowed.
  Cause:
  
  Circular Dependency: The primary cause of this error is that the activity you are trying to maintain has been incorrectly defined to point to itself as a successor. This creates a logical loop that the system cannot process.
  Data Entry Error: It may also arise from a mistake during data entry or configuration where the successor field is inadvertently set to the same activity.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Activity Relationships:
  
  Go to the activity in question and review its successor settings.
  Ensure that the successor field does not point back to the same activity.
  
  
  
  Modify Activity Settings:
  
  If you find that the activity is indeed set as its own successor, change the successor to a valid activity that does not create a circular reference.
  Save the changes and try to execute the operation again.
  
  
  
  Review Project Structure:
  
  If the issue persists, review the overall project structure to ensure that there are no other circular dependencies among activities.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for further guidance on managing activity relationships in PPM.
  
  
  
  Testing:
  
  After making the necessary changes, test the activity to ensure that the error no longer occurs.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Transaction Codes: Familiarize yourself with transaction codes related to PPM and activity management, such as /SAPAPO/PPM for maintaining project activities.
  User Roles: Ensure that you have the appropriate permissions to make changes to activity settings in the system.
  
  If the problem continues after following these steps, it may be beneficial to consult with your SAP support team or a technical consultant who specializes in SAP APO and PPM.