Hi Christina, As Vic mentioned, there is a 5k limitation on the amount of tasks on a project. That said, I typically see that error when there is a problem with the MS Project's timeline, or I've also seen it when using an old version of MS Project (2010/2013), and I've had success reimporting the .msp file into MS Project 2016, and re-exporting it as an xml file, then going through the process again. Give that a go, hopefully that helps. Thanks! Dustin Martin Assigned Support Engineer Workfront