How To Fix CN644 - Deletion not possible, there are still valid assignments

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 644

• Message text: Deletion not possible, there are still valid assignments

What causes this issue?

It is not possible to delete delivery information, because valid
assignments to WBS elements, networks, activities or components still
exist.

How to fix this error?

Before deleting the delivery information, delete all existing
assignments.
To delete assignments to delivery information, choose <ls>Operative
structures</>, <Ls>Delivery information -> Change</> and then <ls>Goto
-> Assignments</>. Select the assignments and choose <ls>Edit -> Delete
assignments</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN644 - Deletion not possible, there are still valid assignments ?

  The SAP error message CN644 ("Deletion not possible, there are still valid assignments") typically occurs in the context of project management or controlling when you attempt to delete a project, work breakdown structure (WBS) element, or network that still has valid assignments or dependencies associated with it. This can happen in various modules, including Project System (PS) and Controlling (CO).
  Cause:
  The error indicates that the object you are trying to delete has existing assignments that prevent its deletion. These assignments could include:
  
  Assigned Costs: There may be costs or budget allocations that are still linked to the project or WBS element.
  Dependencies: Other projects, WBS elements, or networks may depend on the one you are trying to delete.
  Status: The project or WBS element may be in a status that does not allow deletion (e.g., if it is still active or has been partially completed).
  Documents: There may be documents or transactions (like purchase orders, sales orders, etc.) that are still linked to the project.
  
  Solution:
  To resolve the CN644 error, you can follow these steps:
  
  
  Check Assignments: Review the assignments linked to the project or WBS element. You can do this by navigating to the relevant transaction (e.g., CJ03 for WBS elements) and checking for any associated costs, budgets, or dependencies.
  
  
  Remove Dependencies: If there are dependent objects, you may need to delete or reassign them before you can delete the main object.
  
  
  Change Status: If the project or WBS element is in a status that prevents deletion, consider changing its status to a more appropriate one (e.g., "Completed" or "Closed") if applicable.
  
  
  Delete Related Documents: If there are documents linked to the project, you may need to delete or archive them first.
  
  
  Use Transaction Codes: Use transaction codes like CJ20N (Project Builder) or CJ02 (Change WBS) to manage and review the project structure and assignments.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on managing projects and WBS elements.
  
  
  Seek Help from SAP Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting SAP Notes for any known issues or patches related to this error.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ01 (Create WBS), CJ02 (Change WBS), CJ03 (Display WBS), and CJ20N (Project Builder).
  SAP Notes: Check SAP Notes for any updates or specific fixes related to the CN644 error.
  User Roles: Ensure that you have the necessary authorizations to delete projects or WBS elements, as restrictions may also lead to errors.
  
  By following these steps, you should be able to identify the cause of the CN644 error and take appropriate actions to resolve it.