How To Fix MPE_INSTALLATION_MSG062 - Network activity &1 starts before predecessor &2 is completed

SAP Error Message - Details

• Message type: E = Error

• Message class: MPE_INSTALLATION_MSG -

• Message number: 062

• Message text: Network activity &1 starts before predecessor &2 is completed

What causes this issue?

Two network activities are connected by a precedence relationship and a
finish-start relationship. However, the predecessor activity ends after
the start of the successor activity.

System Response

The system does not automatically reschedule network activities.

How to fix this error?

Reschedule the network activities (using transaction <AB>CJ20N</>) to
make the schedule feasible.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MPE_INSTALLATION_MSG062 - Network activity &1 starts before predecessor &2 is completed ?

  The SAP error message MPE_INSTALLATION_MSG062 indicates that there is a network activity that is trying to start before its predecessor activity has been completed. This is a common issue in project management within SAP, particularly when dealing with project planning and scheduling in the Project System (PS) module.
  Cause:
  The error typically arises due to the following reasons:
  
  Incorrect Dependency Setup: The predecessor and successor relationships between activities are not correctly defined. The system expects a certain sequence of operations, and if these are not adhered to, the error will occur.
  Scheduling Conflicts: The scheduling of activities may not be aligned properly, leading to a situation where a successor activity is scheduled to start before its predecessor has finished.
  Manual Changes: If manual changes were made to the scheduling or dependencies of activities, it could lead to conflicts.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Activity Relationships:
  
  Go to the project structure and review the relationships between the activities. Ensure that the predecessor and successor relationships are correctly defined.
  Use transaction codes like CJ20N (Project Builder) to visualize and edit the project structure.
  
  
  
  Adjust Scheduling:
  
  Review the start and finish dates of the activities involved. Make sure that the successor activity is scheduled to start only after the predecessor activity has been completed.
  You may need to adjust the dates or the duration of the activities to ensure proper sequencing.
  
  
  
  Recalculate Dates:
  
  Use the scheduling functions in SAP to recalculate the dates for the activities. This can help in aligning the activities correctly.
  In transaction CJ20N, you can use the "Schedule" function to recalculate the project dates.
  
  
  
  Check for Constraints:
  
  Look for any constraints that may be affecting the scheduling of the activities. Constraints can prevent activities from starting or finishing as expected.
  
  
  
  Consult Documentation:
  
  If the issue persists, consult the SAP documentation or help resources for further guidance on project scheduling and dependencies.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder), CJ02 (Change Project), and CJ03 (Display Project) for managing project activities.
  SAP Notes: Check for any SAP Notes related to project scheduling and dependencies that may provide additional insights or fixes.
  Training: Consider training or resources on SAP Project System (PS) to better understand how to manage project activities and dependencies effectively.
  
  By following these steps, you should be able to resolve the error and ensure that your project activities are scheduled correctly.