Error demo.sh

[antoniusrc]

I just run demo.sh and it's working but it stopped like this:
..... $ build/glove -save-file vectors -threads 8 -input-file cooccurrence.shuf.bin -x-max 10 -iter 15 -vector-size 50 -binary 2 -vocab-file vocab.txt -verbose 2 TRAINING MODEL Read 15 lines. Initializing parameters...Using random seed 1631611252 done. vector size: 50 vocab size: 71290 x_max: 10.000000 alpha: 0.750000 Caught NaN in diff for kdiff for thread. Skipping updateCaught NaN in diff for kdiff for thread. Skipping updateCaught NaN in diff for kdiff for thread. Skipping updateCaught NaN in diff for kdiff for thread. Skipping updateCaught NaN in diff for kdiff for thread. Skipping updateCaught NaN in diff for kdiff for thread. Skipping updateCaught NaN in diff for kdiff for thread. Skipping update

And it stopped. I can not continue at all.

Could somebody help me? Thanks before.