Flaky Slideshow Export

Hello,

I am exporting a slideshow as a video. For the current video of 9minutes and 24 seconds the last 30 odd seconds is black.

I have searched and tried most suggestions on this forum.

The Console show this error for each photo that is missing with a blank screen.

1/12/2015 10:23:09.000 PM kernel[0]: Sandbox: com.apple.iLifeS(478) deny(1) file-read-data /Users/Shared/Pictures/2015.aplibrary/Masters/2015/10/20/20151020-221706/IMG_34 14.JPG

1/12/2015 10:23:09.559 PM com.apple.iLifeSlideshow.MEXPC32ExporterHelper[478]: NULL CGImageSource for Path - /Users/Shared/Pictures/2015.aplibrary/Masters/2015/10/20/20151020-221706/IMG_34 14.JPG!!!

Any thoughts on what I need to do to fix this?

Cheers

Kym