Error from train.lua

[varun-suresh]

This is happening at require 'image' in train.lua. I'm not very familiar with lua but does it have to do with scoping of the imports? Can you also specify the version of lua used? Thanks.

/root/torch/install/bin/luajit: /root/torch/install/share/lua/5.1/threads/threads.lua:183: [thread 2 callback] /root/torch/install/share/lua/5.1/sys/init.lua:40: attempt to index local 'f' (a nil value)
stack traceback:
	/root/torch/install/share/lua/5.1/sys/init.lua:40: in function 'execute'
	/root/torch/install/share/lua/5.1/sys/init.lua:73: in function 'uname'
	/root/torch/install/share/lua/5.1/sys/init.lua:83: in main chunk
	[C]: in function 'require'
	/root/torch/install/share/lua/5.1/xlua/init.lua:37: in main chunk
	[C]: in function 'require'
	/root/torch/install/share/lua/5.1/image/init.lua:33: in main chunk
	[C]: in function 'require'
	train.lua:153: in function <train.lua:150>
	[C]: in function 'xpcall'
	/root/torch/install/share/lua/5.1/threads/threads.lua:234: in function 'callback'
	/root/torch/install/share/lua/5.1/threads/queue.lua:65: in function </root/torch/install/share/lua/5.1/threads/queue.lua:41>
	[C]: in function 'pcall'
	/root/torch/install/share/lua/5.1/threads/queue.lua:40: in function 'dojob'
	[string "  local Queue = require 'threads.queue'..."]:13: in main chunk
stack traceback:
	[C]: in function 'error'
	/root/torch/install/share/lua/5.1/threads/threads.lua:183: in function 'dojob'
	/root/torch/install/share/lua/5.1/threads/threads.lua:264: in function 'synchronize'
	/root/torch/install/share/lua/5.1/threads/threads.lua:142: in function 'specific'
	/root/torch/install/share/lua/5.1/threads/threads.lua:125: in function 'Threads'
	...are/lua/5.1/torchnet/dataset/paralleldatasetiterator.lua:85: in function '__init'
	/root/torch/install/share/lua/5.1/torch/init.lua:91: in function </root/torch/install/share/lua/5.1/torch/init.lua:87>
	[C]: in function 'getIterator'
	train.lua:233: in main chunk
	[C]: in function 'dofile'
	/root/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:145: in main chunk
	[C]: at 0x00406670