Freezing mid recording after exporting

i have edited video 25 min long.  plays fine when checking through end, problems start after exporting.

 

when play recording freezes @ 14 minutes.. timer keeps going both audio , video have frozen.  resaved , second time froze @ 17 minutes.

 

i have apple computer , have brought adobe premiere pro must latest version.

 

i have saved other files without error file on 14 minutes seem have problem with, has happened on 2 different recordings now.  new editing , @ basic level assistance helpful..

 

the video in dropbox dropbox - rapport final.mp4  if view? error around 14 min mark.

More discussions in Premiere Pro CC

adobe