How To Fix CN329 - Milestone is already assigned

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 329

• Message text: Milestone is already assigned

What causes this issue?

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

System Response

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

INCLUDE NA_ALLG_NOVERARBEITUNG OBJECT DOKU ID TX

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 CN329 - Milestone is already assigned ?

  The SAP error message CN329, which states "Milestone is already assigned," typically occurs in the context of project management within SAP, particularly when dealing with milestones in project structures. This error indicates that the milestone you are trying to assign to a project or a network has already been assigned to another project or network.
  Cause:
  
  Duplicate Assignment: The milestone you are trying to assign is already linked to another project or network.
  Incorrect Configuration: There may be issues with the configuration of the project or network that prevent the assignment of the milestone.
  Data Integrity Issues: There could be inconsistencies in the data that lead to this error.
  
  Solution:
  
  
  Check Existing Assignments: 
  
  Use transaction codes like CJ20N (Project Builder) or CN41 (Network Overview) to check where the milestone is currently assigned.
  Identify the project or network that is currently using the milestone.
  
  
  
  Remove Existing Assignment:
  
  If the milestone is no longer needed in the original project or network, you can remove it from there before trying to assign it to the new project or network.
  
  
  
  Use a Different Milestone:
  
  If the milestone is critical in its current assignment, consider creating a new milestone that can be assigned to the desired project or network.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help files for specific guidelines on managing milestones and project structures.
  
  
  
  Check User Authorizations:
  
  Ensure that you have the necessary authorizations to make changes to project structures and milestones.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot identify the cause, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N, CN41, and CJ02 (Change Project) for managing projects and milestones.
  Project Management Best Practices: Understanding best practices in project management within SAP can help prevent such issues in the future.
  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.
  
  By following these steps, you should be able to resolve the CN329 error and successfully manage your project milestones in SAP.