Error from train_lfw.lua

[sudongqi]

.....
Generator network:
nn.gModule
Copy model to gpu
/home/sdq/torch/install/bin/luajit: /home/sdq/.luarocks/share/lua/5.1/nn/THNN.lua:109: wrong number of arguments for function call
stack traceback:
[C]: in function 'v'
/home/sdq/.luarocks/share/lua/5.1/nn/THNN.lua:109: in function 'HardTanh_updateOutput'
/home/sdq/.luarocks/share/lua/5.1/nn/HardTanh.lua:17: in function 'forward'
train_lfw.lua:180: in function 'getSamples'
train_lfw.lua:192: in main chunk
[C]: in function 'dofile'
.../sdq/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:145: in main chunk
[C]: at 0x00406670