I think in the error that you received, it complained about not finding object.
FATA[0033] While handling rdf reader. error=No Object in NQuad package=uidassigner_main
which comes from here:
https://github.com/dgraph-io/dgraph/blob/master/rdf/parse.go#L167
That means, our RDF parser can find neither of the object id or value. It seems like this happens after a while of reading the data, so the culprit line is somewhere down there.
If you post the data file, I can have a look. Or, you could try to identify this particular issue by manually scanning your data. It’s also possible that our parser has some bugs – But, we’ll need to identify the culprit RDF statement.