How To Fix DPR_PROJECT028 - You can no longer change the type of task hierarchy

SAP Error Message - Details

• Message type: E = Error

• Message class: DPR_PROJECT - Development Projects: Messages for Projects

• Message number: 028

• Message text: You can no longer change the type of task hierarchy

What causes this issue?

You are trying to change the project type. The task hierarchy type is
defined in Customizing for project types. Therefore, changing the
project type causes the task hierarchy type to be changed, which is not
permitted.

System Response

The system does not change the project type.

How to fix this error?

You can only change the project type if the task hierarchy type is
changed as follows:
<LS>None</> (no task hierarchy) -> (task hierarchy) <LS>Without Summary
Tasks</>
<LS>None </>-> <LS>With Summary Tasks</>
<LS>With Summary Tasks </>-> <LS>Without Summary Tasks</>
The following changes are not permitted:
<LS>Without Summary Tasks </>-> <LS>With Summary Tasks</>
<LS>Without Summary Tasks </>-> <LS>None</>
<LS>With Summary Tasks</> -> <LS>None</>

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 DPR_PROJECT028 - You can no longer change the type of task hierarchy ?

  The SAP error message DPR_PROJECT028, which states "You can no longer change the type of task hierarchy," typically occurs in the context of project management within SAP, particularly when dealing with the Project System (PS) or the Project Management (PM) module. This error indicates that you are attempting to change the type of a task hierarchy (e.g., from a milestone to a regular task or vice versa) after certain conditions have been met that prevent such changes.
  Cause:
  
  Status of the Project: The project or task may have reached a status that locks certain changes. For example, if the project is already in a status like "Released" or "Completed," changes to the task hierarchy may be restricted.
  Dependencies and Relationships: If there are existing dependencies or relationships between tasks, changing the type of a task may not be allowed to maintain the integrity of the project structure.
  Project Planning Phase: If the project is in a planning phase that does not allow modifications to the task hierarchy, this error can occur.
  
  Solution:
  
  Check Project Status: Review the status of the project and the specific task. If the project is in a status that does not allow changes, you may need to revert the project to a status that permits modifications (if possible).
  Review Dependencies: Check for any dependencies or relationships that may be preventing the change. You may need to remove or adjust these dependencies before attempting to change the task type.
  Use the Correct Transaction: Ensure you are using the correct transaction code for making changes to the project. Sometimes, using the wrong transaction can lead to restrictions.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on changing task types within your version of SAP.
  Contact SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support or your internal SAP team for assistance.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  User Authorizations: Ensure that you have the necessary authorizations to make changes to the project and task hierarchy.
  Training and Documentation: Familiarize yourself with the project management processes in SAP, as understanding the workflow can help prevent such issues in the future.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.