Cannot sync photos from Aperture using iTunes

Yesterday I took 16 photos using a Canon 5D Mark III and uploaded them into Aperture and created a new project to hold them. The I wanted to transfer them into my iPhone so I went to iTunes, connected the iPhone via USB cable and in the left hand side bar under Photos I clicked "Sync Photos", selected "Chose photos from Aperture" and "Events from the last 3 months" and in the events list that appears below, the new project appears checked.The I clicked on Sync and left the iPhone and the MBP connected overnight and it stayed in Step 7 of 7 Importing Photos....

Any ideas on why I have not been able to import that project from Aperture into the iPhone using iTunes?