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".
One reason this appears to 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.
Change any tasks, including summary tasks, that are Manually Scheduled to Auto Scheduled.
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