MSP New Driver Project Save Failed Error due to Summary task scheduling issue

Document ID : KB000100653
Last Modified Date : 26/03/2019
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Issue:
When trying to save a project back from MSP (Microsoft Project) to PPM, receive a Project Save Failed error.

Prior to the project save failed message, receive message <task> in <Project Name> cannot be completed in the time allocated because there is a scheduling conflict between this task and another one to which it is linked".
Cause:
One reason this happen is if a Summary task on the project is manually scheduled and any of its subtasks' Start / Finish dates fall outside the range of the summary task. Note: Even if summary tasks are set as auto scheduled, if you manually change the start date, finish date, or duration of the summary task, it will change the summary task to manually scheduled. This is because Summary tasks that are auto scheduled dates/duration are calculated based on the child tasks under it, so if you manually change a summary task date or duration, MSP looks at this behavior as being that of a manually scheduled summary task instead of a auto scheduled summary task. This issue can also happen if you set a date of a different task, and drag the date cell to tasks that include the summary task. 
Resolution:

Change any tasks, including summary tasks, that are Manually Scheduled to Auto Scheduled or make sure that the Summary task Start/finish dates are updated to include the range of all tasks beneath it.

  • Tip:To check for any manually scheduled summary tasks:  
  1. Add the Task Mode column to the MSP View
  2. Click on the Task Mode drop down and uncheck all check boxes except for Manually Scheduled
  3. You an also filter on just Summary tasks by clicking on the drop down next to Filter in the View tab drop down and selecting 'Summary Tasks'
Additional Information:
Reference KB000047612 - What are recommendations for Auto Scheduled versus Manually Scheduled tasks working in Microsoft Project (MSP) with Clarity PPM?
Reference KB000044475 - Unable to Save Projects back to PPM from MSP if the Project Team has More than One Instance of the Same Role
Reference KB000005264 - MSP Save Failed error due to task Start or Finish Date issues in MSP
Reference KB000008031 - In MSP, receive a "Save Failed" error referencing a Unique Constraint Violation in the logs
Reference KB000071385 - CA PPM and MSP integration - List of Knowledge Documents
Reference KB000015956 - CA PPM and MSP integration known defects - Support Technical Document Index