How To Fix MPE_INSTALLATION_MSG073 - Network activities have same reference point.

SAP Error Message - Details

• Message type: E = Error

• Message class: MPE_INSTALLATION_MSG -

• Message number: 073

• Message text: Network activities have same reference point.

What causes this issue?

Two network activities have the same reference point.

System Response

BOM transfer (transaction CN33_N) uses reference points to assign BOM
items to operation activities. If several activities have the same
reference point, then BOM transfer cannot identify the activity to which
the BOM item is to be assigned.

How to fix this error?

Use different reference points in different network activities.

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_MSG073 - Network activities have same reference point. ?

  The SAP error message MPE_INSTALLATION_MSG073 with the description "Network activities have the same reference point" typically occurs in the context of managing network activities in SAP, particularly when dealing with project management or network planning in modules like SAP PS (Project System) or SAP PM (Plant Maintenance).
  Cause:
  This error usually arises when there are multiple network activities that are assigned the same reference point (or predecessor/successor relationship) within a project or network. In SAP, each activity should have a unique reference point to ensure proper scheduling and dependency management. When two or more activities share the same reference point, it creates ambiguity in the scheduling logic, leading to this error.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Identify Duplicate Reference Points:
  
  Go to the network or project where the error is occurring.
  Check the activities associated with the network and identify any that have the same reference point.
  
  
  
  Modify Activity Relationships:
  
  Change the relationships of the activities so that each one has a unique reference point.
  You may need to adjust the predecessor or successor relationships to ensure that no two activities are pointing to the same reference point.
  
  
  
  Review Network Structure:
  
  Ensure that the overall structure of the network is logical and that activities are sequenced correctly.
  If necessary, reassign activities to different reference points or create new activities to avoid conflicts.
  
  
  
  Check for Errors in Data Entry:
  
  Sometimes, this error can be caused by data entry mistakes. Review the input data for any inconsistencies or errors.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidance on managing network activities and resolving related errors.
  
  
  
  Testing:
  
  After making changes, test the network to ensure that the error no longer occurs and that the project scheduling works as intended.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message. SAP frequently releases updates that may address known issues.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CN21 (Create Network), CN22 (Change Network), and CN41 (Network Overview) to manage network activities effectively.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP support team or a consultant who specializes in SAP project management.