How To Fix /SAPAPO/PPM_MAINTAIN558 - Activity &1 &2 has more than one predecessor with cover flag

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/PPM_MAINTAIN -

• Message number: 558

• Message text: Activity &1 &2 has more than one predecessor with cover flag

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/PPM_MAINTAIN558 - Activity &1 &2 has more than one predecessor with cover flag ?

  The SAP error message /SAPAPO/PPM_MAINTAIN558 indicates that there is an issue with the activity scheduling in the Project and Portfolio Management (PPM) module of SAP Advanced Planning and Optimization (APO). Specifically, the error states that the activity you are trying to maintain has more than one predecessor with the "cover flag" set, which is not allowed.
  Cause:
  
  
  Multiple Predecessors with Cover Flag: The cover flag is used to indicate that a predecessor activity can cover the demand of a successor activity. If an activity has more than one predecessor marked with the cover flag, it creates ambiguity in scheduling, as the system does not know which predecessor to consider for covering the demand.
  
  
  Incorrect Activity Configuration: The configuration of the activities in the project may not have been set up correctly, leading to multiple predecessors being assigned the cover flag.
  
  
  Solution:
  
  
  Review Predecessor Activities: Check the predecessor activities of the activity in question. Identify which predecessors have the cover flag set. You can do this by navigating to the activity details in the PPM module.
  
  
  Adjust Cover Flags: Decide which predecessor should retain the cover flag and remove the cover flag from the others. This will ensure that only one predecessor is marked to cover the demand for the successor activity.
  
  
  Revalidate Activity Relationships: After making the necessary adjustments, revalidate the activity relationships to ensure that the scheduling logic is correct and that there are no further conflicts.
  
  
  Test Changes: Once the adjustments are made, try to save or execute the operation again to see if the error persists.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for PPM and APO for detailed information on activity management and the use of cover flags.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /SAPAPO/PPM for accessing the PPM module and managing activities.
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide additional insights or patches that could resolve the issue.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, providing practical solutions from other users' experiences.
  
  By following these steps, you should be able to resolve the error and maintain the activity successfully.