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

/SAPAPO/PPM_MAINTAIN518 - Overview

• Message type: E = Error

• Message class: /SAPAPO/PPM_MAINTAIN -

• Message number: 518

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

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.

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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