The process for building sessions can be chaotic. With so many abstracts being scheduled into sessions, you need to keep track of which abstracts have been orphaned or neglected by the session chairs. Perhaps some abstracts fell through the cracks, or maybe no session chair wanted that abstract.
To run a report to excel on orphaned abstracts - those that were never assigned to a session, click Sessions drop down menu and then Reports.
Click Export to CSV or Export to Excel under the Export Orphaned Applications option.