the pretrained word representations (word2vec)

[yapingzhao]

An error occurred while I was running the command
python -m nmt.nmt
--src=vi --tgt=en
--vocab_prefix=/tmp/nmt_data/vocab
--train_prefix=/tmp/nmt_data/train
--dev_prefix=/tmp/nmt_data/tst2012
--test_prefix=/tmp/nmt_data/tst2013
--out_dir=/tmp/nmt_model
--num_train_steps=12000
--steps_per_stats=100
--num_layers=2
--num_units=128
--dropout=0.2
--metrics=bleu
--embed_prefix=nmt/nmt_data/vector
error:"All embedding size should be size."
but,bilingual word size are the same.
please give me some suggestions, thank you!