Reading the vocabulary fails because missing `vocabulary.pickle`

[shershen08]

I have all pre requisitions installed, initial phase of ./prepare.sh goes well and then fails without vocabulary.pickle

Reading the vocabulary...
Traceback (most recent call last):
  File "prepare_embeddings.py", line 11, in <module>
    dataset = DataSet()
  File "/tensorflow-nlp-master/dataset.py", line 54, in __init__
    self.vocabulary = self._read_vocabulary()
  File "/tensorflow-nlp-master/dataset.py", line 28, in _read_vocabulary
    with open('vocabulary.pickle', 'rb') as vocabulary_file:
FileNotFoundError: [Errno 2] No such file or directory: 'vocabulary.pickle'