graphviz wrong number of arguments error

[Yong Fei]

Running this (from the example)

require 'nngraph'

h1 = nn.Linear(20, 10)()
h2 = nn.Linear(10, 1)(nn.Tanh()(nn.Linear(10, 10)(nn.Tanh()(h1))))
mlp = nn.gModule({h1}, {h2})

x = torch.rand(20)
dx = torch.rand(1)
mlp:updateOutput(x)
mlp:updateGradInput(x, dx)
mlp:accGradParameters(x, dx)

-- draw graph (the forward graph, '.fg')
graph.dot(mlp.fg, 'MLP', '/home/yongfei')

Got this error.

.. /lua/5.1/graph/graphviz.lua:156: wrong number of arguments for function call

stack traceback:
    [C]: in function 'gvRender'
    ...e/yongfei/torch/install/share/lua/5.1/graph/graphviz.lua:156: in function 'graphvizFile'
    ...e/yongfei/torch/install/share/lua/5.1/graph/graphviz.lua:181: in function 'dot'
    train.lua:154: in main chunk
    [C]: in function 'dofile'
    ...gfei/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:133: in main chunk

What have I missed?

[Yong Fei]

Fixed it by reinstalling graph :)

luarocks install graph