Project Server 2010 - SP1
So, I am aware of the limitation around updating only one task at a time if you are going to update the TASK_IS_ACTIVE flag through the PSI. I have been successfully updating tasks to be inactive in one of my test plans, but when I try to update a task in a copy of a live project plan, it will not update any of the tasks to inactive. Additionally, it does not return an error. I know that the QueueUpdateProject service call is working because I can change other content, like dates, but it will not change the TASK_IS_ACTIVE flag.
Can anyone explain the inconsistent behavior?