installation: error loading module 'libpaths'

[lverwimp]

I installed Torch and DP, but I am getting this error whenever I try to use DP (Torch works):

require 'dp'
error loading module 'libpaths' from file '.../torch/install/lib/lua/5.1/libpaths.so':
.../torch/install/lib/lua/5.1/libpaths.so: undefined symbol: lua_replace
stack traceback:
[C]: in ?
[C]: in function 'require'
.../torch/install/share/lua/5.1/paths/init.lua:1: in main chunk
[C]: in function 'require'
.../torch/install/share/lua/5.1/torch/init.lua:12: in main chunk
[C]: in function 'require'
.../torch/install/share/lua/5.1/nnx/init.lua:28: in main chunk
[C]: in function 'require'
.../torch/install/share/lua/5.1/dp/init.lua:1: in main chunk
[C]: in function 'require'
stdin:1: in main chunk
[C]: in ?

Since libpaths.so is a binary file, it is impossible to detect why lua_replace is an undefined symbol. Any idea how I could solve this?

Thank you in advance!

[soumith]

before starting torch, try this line:

export LD_LIBRARY_PATH=~/torch/install/lib:$LD_LIBRARY_PATH

see if it helps.

If that does not help, try:

LD_PRELOAD=~/torch/install/lib/libluajit.so th

let me know if that works.

[lverwimp]

Torch was already in the library path, but I found another solution: using qlua instead of lua.

Thank you!

[rajeshnjr]

When i check itorch in my terminal(ubuntu) i am getting this following error
$ itorch
/home//torch/install/bin/luajit: error loading module 'lzmq' from file '/home/tis32/torch/install/lib/lua/5.2/lzmq.so':
/home/tis32/torch/install/lib/lua/5.2/lzmq.so: undefined symbol: luaL_setfuncs
stack traceback:
[C]: at 0x080b4080
[C]: in function 'require'
/home/tis32/torch/install/share/lua/5.2/itorch/main.lua:11: in main chunk
[C]: in function 'require'
(command line):1: in main chunk
[C]: at 0x0804d6d0
/home/tis32/torch/install/bin/luajit: error loading module 'libpaths' from file '/home/tis32/torch/install/lib/lua/5.2/libpaths.so':
/home/tis32/torch/install/lib/lua/5.2/libpaths.so: undefined symbol: luaL_setfuncs
stack traceback:
[C]: at 0x080b4080
[C]: in function 'require'
/home/tis32/torch/install/share/lua/5.2/paths/init.lua:1: in main chunk
[C]: in function 'require'
/home/tis32/torch/install/share/lua/5.2/torch/init.lua:12: in main chunk
[C]: in function 'require'
...e/tis32/torch/install/share/lua/5.2/itorch/IOHandler.lua:10: in main chunk
[C]: in function 'require'
(command line):1: in main chunk
[C]: at 0x0804d6d0
Jupyter Console 4.0.3

[ZMQTerminalIPythonApp] Loading IPython extension: storemagic
ERROR: Kernel did not respond

Shutting down kernel

and when i check ipython it displays

$ ipython
Python 3.5.1 |Anaconda 2.4.1 (32-bit)| (default, Dec 7 2015, 11:17:45)
Type "copyright", "credits" or "license" for more information.

IPython 4.0.1 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object', use 'object??' for extra details.

[AdrianScott]

Thanks, @soumith , that LD_LIBRARY_PATH line solved it for me.

I've added that to .bashrc and it's working great.

Thanks

[feaber]

Hi, I have same error when try to require "torch" or "paths".

I know windows is not supported officialy, but perhaps You know some trick how to use correct lib.
Can You describe me how this "export LD_LIBRARY_PATH=~/torch/install/lib:$LD_LIBRARY_PATH" help on linux?

I'm using vanila lua5.1 on MinGW

[feaber]

Hi, sorry for flooding the topic but I fix it.
I probably mess something with cmake.

My LUA lib is:
D:\lua5.1\lib

And "make install" does not put "libtorch.dll" and "libpaths.dll" in correct place ("D:\lua5.1\lib\lua\5.1" !).
(also I have to put "torch" folder containing .lua files in "D:\lua5.1\share\lua\5.1" manually
earlier)

I have build both using this:
cmake -E make_directory build
cd build
cmake .. -G "MSYS Makefiles" -DCMAKE_BUILD_TYPE=Release -DLUALIB=lua51.dll -DLUA_INCDIR="%LUA_INCDIR%" -DLUA_LIBDIR="%LUA_LIBDIR%" -DLUA="%LUA%"
make

Where:
LUA=lua
LUA_CPATH=d:\lua5.1\lib\lua\5.1?.dll;%APPDATA%\LuaRocks\lib\lua\5.1?.dll
LUA_INCDIR=D:/lua5.1/include
LUA_LIBDIR=D:/lua5.1/bin
LUA_PATH=C:\Program Files (x86)\LuaRocks\lua?.lua;C:\Program Files (x86)\LuaRocks\lua?\init.lua;%APPDATA%\LuaRocks\share\lua\5.1?.lua;%APPDATA%\LuaRocks\share\lua\5.1?\init.lua;d:\lua5.1\share\lua\5.1?.lua;d:\lua5.1\share\lua\5.1?\init.lua

And my PATH contains (on top):
D:\MinGW\bin;D:\lua5.1\bin;...

So great it worked :)) I have spend whole day fighting with this :)

I will try to read some more about Makefile/CMake and bring path for Windows/MinGW
This is odd because LUA_LIBDIR have to be set (or contain) to path containing "lua51.dll" and for "make install" it should be set to "D:\lua5.1\lib\lua\5.1"

Correct me if I missing something. I'm not C/LUA expert.

[rk1992]

I installed DP but whenever i try to call it i get the following error

/home/rajkumar/torch/install/share/lua/5.2/trepl/init.lua:389: /home/rajkumar/torch/install/share/lua/5.2/trepl/init.lua:389: /home/rajkumar/torch/install/share/lua/5.2/trepl/init.lua:389: /home/rajkumar/torch/install/share/lua/5.2/torch/init.lua:102: class nn.ZeroGrad has been already assigned a parent class

stack traceback:
/home/rajkumar/torch/install/share/lua/5.2/trepl/init.lua:506: in function </home/rajkumar/torch/install/share/lua/5.2/trepl/init.lua:499>
[C]: in function 'error'
/home/rajkumar/torch/install/share/lua/5.2/trepl/init.lua:389: in function 'require'
[string "_RESULT={require 'dp'}"]:1: in main chunk
[C]: in function 'xpcall'
/home/rajkumar/torch/install/share/lua/5.2/trepl/init.lua:661: in function 'repl'
...umar/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:204: in main chunk
[C]: in ?

[priyankasin]

While Extract the features from aligned images with batch-represent I got an error:

luajit: error loading module 'libpaths' from file '/home/samar/torch/install/lib/lua/5.2/libpaths.so':
/home/samar/torch/install/lib/lua/5.2/libpaths.so: undefined symbol: luaL_setfuncs
stack traceback:
[C]: at 0x004525b0
[C]: in function 'require'
/home/samar/torch/install/share/lua/5.2/paths/init.lua:1: in main chunk
[C]: in function 'require'
/home/samar/torch/install/share/lua/5.2/torch/init.lua:12: in main chunk
[C]: in function 'require'
./batch-represent/main.lua:3: in main chunk
[C]: at 0x004044a0

So can anyone who help me to solve this issue?