XER field Leave feedback On this page XER field See Also XER field The XER file format is a proprietary project file format used by Primavera P6 project planning and management application. Learn more about this file format here. See Also class ProjectManagementFileType Was this page helpful? Not really Yes, thanks Any additional feedback you'd like to share with us? Skip Send Please tell us how we can improve this page. Skip Send Thank you for your feedback! We value your opinion. Your feedback will help us improve our documentation.