Boot Camp Assistant quit unexpectedly

I purchased a brand new MacBook Pro w/Retina 15" beginning of January, 2014. I also purchased a copy of Windows 7 Pro 64-bit and new 16GB SanDisk thumb drive. I follow the directions to install Windows w/Boot Camp but constantly get the following error (picture attached). Any help would be appreciated. When I start Boot Camp, all three options are selected ("Creates Windows 7 Install Disk", "Download Apple Support Software", "Install Windows"). The next screen has a progress bar that makes it to about 75% then fails and generates the error.

I also went to the Apple Store but didn't get much help...