invalid parent class name nn.Decorator

[Sarah20187]

After I installed rnn following the instrument, I had the error here:

/home/mata/torch/install/bin/luajit: /home/mata/torch/install/share/lua/5.1/trepl/init.lua:389: /home/mata/torch/install/share/lua/5.1/trepl/init.lua:389: /home/mata/torch/install/share/lua/5.1/trepl/init.lua:389: /home/mata/torch/install/share/lua/5.1/torch/init.lua:102: bad argument #2 (invalid parent class name nn.Decorator)
stack traceback:
[C]: in function 'error'
/home/mata/torch/install/share/lua/5.1/trepl/init.lua:389: in function 'require'
train_residual.lua:12: in main chunk
[C]: in function 'dofile'
...ehua/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:150: in main chunk
[C]: at 0x00406670

[JoostvDoorn]

You should update the nn module, try reinstalling torch or install a new version of nn:

luarocks install nn

[Sarah20187]

@JoostvDoorn Thank you for your suggestion. Finally I solved this problem by Element-Research/dpnn#91

[tastyminerals]

@zhFuECL please don't forget close this.

[idansc]

I followed dpnn#91 instructions, and I still get the same error while including rnn library, @zhFuECL can you please elaborate how you solved it?

[tastyminerals]

@idansc please refer to @pranas solution Element-Research/dpnn#91:

Our solution was to force install previous version of dpnn like so:

git clone https://github.com/Element-Research/dpnn.git && \
  cd dpnn && \
  git reset --hard ca0e99fa6d0dfd971f0f284520562765ae0865fd && \
  luarocks make rocks/dpnn-scm-1.rockspec

[idansc]

@tastyminerals Thanks! Actually I solved it by installing latest torch, nn and dpnn. Probably torch is now using the newer version of nn.