Hi,
I am getting the following theano error:
Traceback (most recent call last):
File "/home/user/mmueller/nematus-context2/nematus/nmt.py", line 1995, in
<module>
train(**vars(args))
File "/home/user/mmueller/nematus-context2/nematus/nmt.py", line 1439, in
train
grads = tensor.grad(cost, wrt=itemlist(updated_params))
File
"/home/user/mmueller/.pythonz/pythons/CPython-2.7.13/lib/python2.7/site-packages/theano/gradient.py"
, line 539, in grad
handle_disconnected(elem)
File
"/home/user/mmueller/.pythonz/pythons/CPython-2.7.13/lib/python2.7/site-packages/theano/gradient.py"
, line 526, in handle_disconnected
raise DisconnectedInputError(message)
theano.gradient.DisconnectedInputError:
Backtrace when that variable is created:
File "/home/user/mmueller/nematus-context2/nematus/nmt.py", line 1995, in
<module>
train(**vars(args))
File "/home/user/mmueller/nematus-context2/nematus/nmt.py", line 1377, in
train
tparams = init_theano_params(params)
File "/home/user/mmueller/nematus-context2/nematus/theano_util.py", line
57, in init_theano_params
tparams[kk] = theano.shared(params[kk], name=kk)
As far as I understand, this means that I am requesting the gradient with
respect to a variable that was not used to compute the cost.
My model has a large number of theano variables, and I find the error
message a bit uninformative. *How can I find out which variable is causing
this error?*
$ python -c "import theano; print theano.version.version"
0.9.0
Thanks so much,
Mathias
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