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ImportError: DLL load failed on Windows 8.1 #445

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ivan-ushakov opened this issue May 31, 2017 · 21 comments
Open

ImportError: DLL load failed on Windows 8.1 #445

ivan-ushakov opened this issue May 31, 2017 · 21 comments

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@ivan-ushakov
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How I install:

C:\Users\ivan>conda install Theano pygpu
Fetching package metadata .........
Solving package specifications: ..........

Package plan for installation in environment C:\Users\ivan\Anaconda3:

The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    conda-env-2.6.0            |                0          498 B
    theano-0.9.0               |           py36_0         4.0 MB
    ------------------------------------------------------------
                                           Total:         4.0 MB

The following NEW packages will be INSTALLED:

    pygpu:     0.6.4-py36_0
    theano:    0.9.0-py36_0

The following packages will be UPDATED:

    conda:     4.2.13-py36_0 conda-forge --> 4.3.21-py36_0

The following packages will be SUPERCEDED by a higher-priority channel:

    conda-env: 2.6.0-0       conda-forge --> 2.6.0-0

Proceed ([y]/n)? y

Pruning fetched packages from the cache ...
Fetching packages ...
conda-env-2.6. 100% |###############################| Time: 0:00:00  31.87 kB/s
theano-0.9.0-p 100% |###############################| Time: 0:00:01   3.30 MB/s
Extracting packages ...
[      COMPLETE      ]|##################################################| 100%
Unlinking packages ...
[      COMPLETE      ]|##################################################| 100%
Linking packages ...
[      COMPLETE      ]|##################################################| 100%

How I check:

C:\Users\ivan>python
Python 3.6.0 |Anaconda 4.3.1 (64-bit)| (default, Dec 23 2016, 11:57:41) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import theano
ERROR (theano.gpuarray): pygpu was configured but could not be imported or is too old (version 0.6 or higher required)
NoneType: None
>>> import pygpu
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Users\ivan\Anaconda3\lib\site-packages\pygpu\__init__.py", line 7, in <module>
    from . import gpuarray, elemwise, reduction
ImportError: DLL load failed: The specified module could not be found.

DLL location:

C:\Users\ivan>dir C:\Users\ivan\Anaconda3\pkgs\libgpuarray-0.6.4-vc14_0\Library\bin\gpuarray.dll

12.04.2017  03:22           194 048 gpuarray.dll
@abergeron
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You seem to be mixing conda-forge and regular conda packages. Make sure you install theano and pygpu/libgpuarray from the same source as your python install.

pygpu is the name of the official conda package.

libgpuarray is the name of the conda-forge package.

@ivan-ushakov
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ivan-ushakov commented May 31, 2017 •
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I was thinking that if I use conda tool then I use same source as my python install. How can I check what is wrong?

Anyway, I removed pygpu, libgpuarray and theano and tried to install only theano:

C:\Users\ivan>conda install theano
Fetching package metadata ...........
Solving package specifications: .

Package plan for installation in environment C:\Users\ivan\Anaconda3:

The following NEW packages will be INSTALLED:

    libgpuarray: 0.6.4-vc14_0 [vc14]
    pygpu:       0.6.4-py36_0
    theano:      0.9.0-py36_0

Proceed ([y]/n)? y

As you see pygpu and libgpuarray installed together.

@abergeron
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This seems ok because they now both come from the official packages.

Are you still having problems?

@ivan-ushakov
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Yes, problem is still the same. Can't load DLL for some reason. Do you need anything from my side, environment variables, versions of tools?

@abergeron
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Can you list the contents of C:\Users\ivan\Anaconda3\lib\site-packages\pygpu\

@ivan-ushakov
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Sure. Here it is:

C:\Users\ivan>dir C:\Users\ivan\Anaconda3\Lib\site-packages\pygpu

31.05.2017  18:31    <DIR>          .
31.05.2017  18:31    <DIR>          ..
12.04.2017  03:43             1 773 basic.py
31.05.2017  18:31           349 599 blas.c
12.04.2017  03:43            49 664 blas.cp36-win_amd64.pyd
12.04.2017  03:43             4 534 blas_api.h
31.05.2017  18:31         1 055 991 collectives.c
12.04.2017  03:43           159 744 collectives.cp36-win_amd64.pyd
12.04.2017  03:43             1 332 collectives.h
12.04.2017  03:43             7 273 collectives_api.h
12.04.2017  03:43             6 739 dtypes.py
12.04.2017  03:43             3 167 elemwise.py
31.05.2017  18:31         1 787 516 gpuarray.c
12.04.2017  03:43           304 128 gpuarray.cp36-win_amd64.pyd
12.04.2017  03:43             1 961 gpuarray.h
12.04.2017  03:43            13 621 gpuarray_api.h
12.04.2017  03:43               808 numpy_compat.h
12.04.2017  03:43             4 050 operations.py
12.04.2017  03:43            10 177 reduction.py
31.05.2017  18:31    <DIR>          tests
12.04.2017  03:43             8 490 tools.py
12.04.2017  03:43               101 version.py
12.04.2017  03:43            10 304 _array.py
31.05.2017  18:31           438 301 _elemwise.c
12.04.2017  03:43            50 176 _elemwise.cp36-win_amd64.pyd
12.04.2017  03:43               748 __init__.py
31.05.2017  18:31    <DIR>          __pycache__

Also here is egg:

C:\Users\ivan>dir C:\Users\ivan\Anaconda3\Lib\site-packages\pygpu-0.6.4-py3.6.egg-info

31.05.2017  18:31    <DIR>          .
31.05.2017  18:31    <DIR>          ..
12.04.2017  03:43                 1 dependency_links.txt
12.04.2017  03:43               236 PKG-INFO
12.04.2017  03:43                14 requires.txt
12.04.2017  03:43               651 SOURCES.txt
12.04.2017  03:43                18 top_level.txt

@abergeron
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Can you try to use Dependecy Walker (http://www.dependencywalker.com/) on gpuarray.cp36-win_amd64.pyd?

@ivan-ushakov
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ivan-ushakov commented Jun 6, 2017 •
edited
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Ok, Here it is.
gpuarray.cp36-win_amd64.zip

@abergeron
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According to the trace, it fails to load python36.dll. I don't think that this is right, especially when you run from python.

The funny thing is that it finds gpuarray.dll, so maybe a live tracing would be required to see what fails to load and why. I'm not too sure how to do that on windows however.

@ivan-ushakov
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I found strange thing.

C:\Users\ivan\Anaconda3\pkgs

31.05.2017  14:18    <DIR>          libgpuarray-0.6.4-vc14_0
31.05.2017  14:17           248 285 libgpuarray-0.6.4-vc14_0.tar.bz2

...

31.05.2017  14:18    <DIR>          pygpu-0.6.4-py36_0
31.05.2017  14:17           587 512 pygpu-0.6.4-py36_0.tar.bz2

...

31.05.2017  16:16    <DIR>          theano-0.9.0-py36_0
31.05.2017  16:16         4 224 495 theano-0.9.0-py36_0.tar.bz2

C:\Users\ivan\Anaconda3\Lib\site-packages

31.05.2017  18:31    <DIR>          pygpu
31.05.2017  18:31    <DIR>          pygpu-0.6.4-py3.6.egg-info

31.05.2017  18:31    <DIR>          theano
31.05.2017  18:31    <DIR>          Theano-0.9.0-py3.6.egg-info

Do you know how pkg folder used in Anaconda Python? And why I have entries with different date?

@abergeron
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pkg is the repository of conda packages that you have downloaded.
site-packges are those that are in you root conda env.

The dates are all the same, it's only the hour which varies a bit, but I don't think it's a problem of any kind.

Are you doing the tests in the "Anaconda command prompt" or just a regular shell?

@ivan-ushakov
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I use regular shell (cmd). I just run python and execute import theano.

@abergeron
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Can you try from the Anaconda command prompt?

@ivan-ushakov
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ivan-ushakov commented Jun 6, 2017 •
edited
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I opened Anaconda command prompt, ran python and executed import theano and now it just print

ERROR (theano.gpuarray): pygpu was configured but could not be imported or is too old (version 0.6 or higher required)
NoneType: None

When I try import pygpu it shows error from my first message about DLL.

@abergeron
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This is strange. Do you have another install of Theano somewhere?

Try running conda list theano and conda list pygpu.

@ivan-ushakov
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Here is full output.
conda_list.txt

@abergeron
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I'm sorry but I have no idea what's wrong.

You could try to completely remove anaconda and reinstall it if it's not too much of a hassle, but I have no guarantees that it will even help.

@ivan-ushakov
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BTW

pkg is the repository of conda packages that you have downloaded.
site-packges are those that are in you root conda env.

Why I don't see libgpuarray in site-packages?

@abergeron
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Because libgpuarray is a C library not a python package.

@ivan-ushakov
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So it could be the source of problem. I will try to investigate this and return to you with results.

@abergeron
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It is normal that there is no libgpuarray package in the site-packages directory. There shouldn't be one and it is not a source of problems.

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@abergeron @ivan-ushakov