some export operations were not performed in Lightroom 4

Lightroom 4

ERROR
"some export operations were not performed" message appeared after exporting files.



SOLUTION

1.  Uncheck the "Include video files"

2.  Now your file should be converted to new resolution or megapixels.


PROBLEM

Cannot uncheck the "Include video files" box, because its grey or hidden.

Solution

1.   Import one of your video file.

2.   Then the "Include video files" box appeared and enabled to uncheck.

3.   Uncheck it.

4.   Change all your resolution or megapixels or limit files size.

5.   "Add" (rename 'preset name')

6.   Cancel the export operation.

7.   Import your photos and u will able to export without problem.