Error when training

[anbasile]

I am using seq2seq-attn to go from AMRs to English.

I am using this command:

th train.lua -data_file data/delexichar-train.hdf5 -val_data_file data/delexichar-val.hdf5 -savefile delexichar -use_chars_enc 1 -use_chars_dec 1 -gpuid 1 -save_every 5 -cudnn 1

And I get the following error:

using CUDA on GPU 1...
loading cudnn...
loading data...
done!
Source vocab size: 33296, Target vocab size: 47527
Source max sent len: 336, Target max sent len: 338                                                                                        [16/1668]
Number of additional features on source side: 0
Switching on memory preallocation
Number of parameters: 43885727 (active: 43885727)
/home/ubuntu/src/torch/install/bin/luajit: bad argument #2 to '?' (end index out of bound)
stack traceback:
        [C]: at 0x7f957c1aa210
        [C]: in function '__index'
        train.lua:395: in function 'train_batch'
        train.lua:750: in function 'train'
        train.lua:1091: in function 'main'
        train.lua:1094: in main chunk
        [C]: in function 'dofile'
        .../src/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:150: in main chunk
        [C]: at 0x00405d50

I am running this on a p2.xlarge machine on AWS. Any ideas on how to fix this?