cjson.so: undefined symbol: lua_objlen stack traceback: train.lua

[Malhabib]

/home/alhabib/torch/install/bin/lua: /home/alhabib/torch/install/share/lua/5.2/trepl/init.lua:389: .../alhabib/torch/install/share/lua/5.2/luarocks/loader.lua:117: error loading module 'cjson' from file '/home/alhabib/torch/install/lib/lua/5.2/cjson.so':
/home/alhabib/torch/install/lib/lua/5.2/cjson.so: undefined symbol: lua_objlen
stack traceback:
[C]: in function 'error'
/home/alhabib/torch/install/share/lua/5.2/trepl/init.lua:389: in function 'require'
train.lua:14: in main chunk
[C]: in function 'dofile'
...abib/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:150: in main chunk
[C]: in ?
I tried many solutions but non of them works, I'm using Torch 7 and cuda 8.0 , python 2.7, can anyone help me , it happend with (th train.lua) , the preprocessing step works fine.

[aurooj]

I am facing the same problem. Did you figure out the solution?

[aurooj]

This problem was solved by downgrading the cjon version as mentioned here:
mpx/lua-cjson#56 (comment)

[jainal09]

Hey,
Check this docker image I created for running dense cap in gpu!
https://hub.docker.com/r/jainal09/densecap_gpu

For Cpu version.
Use this docker file.
https://github.com/runwayml/alpha_models/blob/master/densecap/Dockerfile