How To Fix DPR_PROJECT070 - Subtasks for summary tasks are not permitted with top-down scheduling

DPR_PROJECT070 - Overview

• Message type: E = Error

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

• Message number: 070

• Message text: Subtasks for summary tasks are not permitted with top-down scheduling

What causes this issue?

Although the project uses top-down scheduling, its project type
activates the use of summary tasks in task hierarchies. However, summary
tasks are only supported in combination with bottom-up scheduling.

System Response

You cannot create subtasks.

How to fix this error?

If you want to create subtasks, change the scheduling type of your
project to <LS>Bottom-Up</>. You can do so in the <LS>Structure</> ->
<LS>Detail</> view on the <LS>Dates and Work</> tab page of the project
definition.

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_PROJECT070 - Subtasks for summary tasks are not permitted with top-down scheduling ?

  The SAP error message DPR_PROJECT070 indicates that there is an issue with the scheduling of subtasks within a summary task when using top-down scheduling in the SAP Project Management module. This error typically arises when you attempt to create or modify a project structure that violates the rules of top-down scheduling.
  
  Cause:
  
  Top-Down Scheduling: In top-down scheduling, the start and finish dates of summary tasks are determined first, and then the subtasks are scheduled within those constraints. If you have subtasks defined under a summary task, the system does not allow for the scheduling of these subtasks in a way that conflicts with the overall timeline of the summary task.
  Project Structure: The project structure may not be set up correctly, or there may be an attempt to assign dates or durations to subtasks that do not align with the summary task's schedule.
  Configuration Settings: The project settings may not be configured to allow