There is a bug in Lightroom CC 6.0.
When I want to export one file as jpg, the Export button shows 403 files
which is not what I expected since I was only editting one file.
The 403 files are the number of files I have in Lightroom.
I worked around this problem by exiting Lightroom and then bringing it back up.
This Export 403 files happened multiple times so its a consistent bug.
Please fix this problem.
[moved from bugs to discussions - Mod.]
Make sure you haven't inadvertently got all 403 images selected when you try the export. Do Cmd+D (will deselect all selected images), then click on the single image that you want to export, then try the export again. Does it work correctly now?
I'm pretty sure I didn't inadvertently select all the files.
It only happened with latest version of Lightroom.
If you try another export of a single file, does it still happen?