How To Fix CN328 - A milestone has already been assigned to event &

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 328

• Message text: A milestone has already been assigned to event &

What causes this issue?

You want to assign a milestone to a date type. However this date type
has a milestone assigned already.

System Response

You can only assign one milestone to a date type.

How to fix this error?

Select another date type or delete the existing assignment.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN328 - A milestone has already been assigned to event & ?

  The SAP error message CN328 indicates that a milestone has already been assigned to a specific event in the project management module. This typically occurs when you attempt to assign a milestone to an event that already has a milestone linked to it.
  Cause:
  
  Duplicate Assignment: The primary cause of this error is that the event you are trying to assign a milestone to already has a milestone assigned.
  Incorrect Event Selection: You may have selected the wrong event or milestone inadvertently.
  System Configuration: There may be specific configurations or settings in the project management module that restrict multiple milestones for a single event.
  
  Solution:
  
  
  Check Existing Assignments: 
  
  Navigate to the event in question and check if a milestone is already assigned. You can do this by viewing the event details in the project management module.
  
  
  
  Remove Existing Milestone: 
  
  If you need to assign a new milestone, you may need to first remove the existing milestone from the event. This can typically be done in the event's detail screen.
  
  
  
  Assign the New Milestone: 
  
  After removing the existing milestone, you can then proceed to assign the new milestone to the event.
  
  
  
  Consult Documentation: 
  
  If you are unsure about the process, refer to the SAP documentation or user manuals for guidance on managing milestones and events.
  
  
  
  Check User Permissions: 
  
  Ensure that you have the necessary permissions to modify milestones and events in the system.
  
  
  
  Contact Support: 
  
  If the issue persists or if you believe it is a system error, consider reaching out to your SAP support team or consulting with an SAP expert.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder) or CN21 (Create Milestone) to manage project milestones and events effectively.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Training: Consider training sessions or workshops on SAP Project System (PS) to better understand how milestones and events are managed.
  
  By following these steps, you should be able to resolve the CN328 error and manage your project milestones effectively.