Premiere Pro "Quit Unexpectedly" during export

hello,

 

i've tried export sequence multiple times using both premiere pro , media encoder. each time tried export, applications quit unexpectedly. record, have exported sequence many times using vimeo 720 preset.

 

macbook pro (15 inch, mid 2010)

2.66 ghz intel core i7

8gb ram

graphics nvidia geforce gt 330m 512 mb

500 gb solid state drive (samsung) - 50gb free space

source footage/project on 1tb external drive via usb

 

adobe premiere pro cc 2015.3

adobe media encoder cc 2015.3

 

sequence: 1920x1080 - 23.976 fps - progressive - 48000 hz, stereo

 

sequence duration: 3 minutes - 8 seconds - 6 frames

 

source footage: 4k mpeg footage sony a7r ii camera. 1080p mpeg

 

workflow: edited using 720p proxy files. reconnected hq/4k files. downscaled fit 1920x1080. color graded , added effects. exported in 720 test out color grade. made changes. want export final version uploaded youtube , vimeo.

 

effects used: clips have lumetri color grade. have simple magic bullet looks. denoiser ii. few clips used twixtor slow motion.

 

export settings: h.264 - youtube 1080p hd preset

 

estimated  export time: approx. 5 hours. (for 3min video??? seems unreal.)

 

 

i have been closing other apps during export , disconnecting internet. keeping laptop sleeping using caffeine app. still, after few hours application closes message "premiere pro (or media encoder) quit unexpectedly. can't @ point export quit. what doing wrong??

 

i aware there update apps, i'm afraid updating screw up.

i have cleaned media caches , going try again, time export external drive source footage , see if makes difference.

 

before exporting laptop's hard drive.

 

currently @ 3% - 3hrs 25min... time seems keep rising.

More discussions in Premiere Pro CC

adobe