Segmentation fault (core dumped)

[LF-DevJourney]

I use recommender to recommend songs. When I use the default recommender, it works well.

model = turicreate.recommender.create(training_data, 'user_id', 'song_id', target='rank')

But when I changed it to item_similarity_recommender I get the segmentation fault(core dumped) exception.

model = turicreate.item_similarity_recommender.create(actions, 'user_id', 'song_id', target='rank')

[TobyRoseman]

Please share the entire output of turicreate.item_similarity_recommender.create.

What does training_data['rank'] look like?