I just imported a folder of 336 .CR2 photos taken with a 5DM3 into CC 2015 and it only seemed to import 294 of the files. I did not receive any error messages. Any idea why it may not be importing all of the files? I tried reimporting the folder, though it shows that all of the photos in the folder have already been imported. Any suggestions?
Please check, you may have that images already imported in the Lightroom.
Also, check the image format for all the 336 image you are trying to import in Lightroom and check, are they all in .CR2 format.