Having the same issue.
rbenjamin
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I should have mentioned I've noticed it happens when I have more than 50 or so objects. When it's fewer I still see the "Import failed because applying the accumulated changes hit an unhandled exception., NSUnderlyingException=Batch finished processing with pending changes in the moc. This prevents the context from being reset and purging rows / snapshots from memory. Please save at the end of each batch." error, but the data syncs.