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

CN644 - Overview

• 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,