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https://issues.apache.org/jira/browse/ARROW-1554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16171680#comment-16171680
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Wes McKinney commented on ARROW-1554:
-------------------------------------
I just tested the 0.7.0 wheel locally on Windows 10 and it works OK for me. Is
it possible that you had one of the DLLs open when you updated pyarrow? Maybe
try removing the directory and reinstalling
> "ImportError: DLL load failed: The specified module could not be found" on
> Windows 10
> -------------------------------------------------------------------------------------
>
> Key: ARROW-1554
> URL: https://issues.apache.org/jira/browse/ARROW-1554
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.7.0
> Environment: Windows 10 (x64)
> Python 3.6.2 (x64)
> Reporter: Dima Ryazanov
> Fix For: 0.8.0
>
>
> I just tried pyarrow on Windows 10, and it fails to import for me:
> {code}
> >>> import pyarrow
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "C:\Program Files\Python36\lib\site-packages\pyarrow\__init__.py",
> line 32, in <module>
> from pyarrow.lib import cpu_count, set_cpu_count
> ImportError: DLL load failed: The specified module could not be found.
> {code}
> Not sure which DLL is failing, but I do see some DLLs in the pyarrow folder:
> {code}
> C:\Users\dima\Documents>dir "C:\Program
> Files\Python36\lib\site-packages\pyarrow\"
> Volume in drive C has no label.
> Volume Serial Number is 4CE9-CC3C
> Directory of C:\Program Files\Python36\lib\site-packages\pyarrow
> 09/19/2017 01:14 AM <DIR> .
> 09/19/2017 01:14 AM <DIR> ..
> 09/19/2017 01:14 AM 2,382,336 arrow.dll
> 09/19/2017 01:14 AM 604,160 arrow_python.dll
> 09/19/2017 01:14 AM 3,402 compat.py
> ...
> {code}
> However, I cannot open them using ctypes.cdll. I wonder if some dependency is
> missing?
> {code}
> >>> open('C:\\Program
> >>> Files\\Python36\\Lib\\site-packages\\pyarrow\\parquet.dll', 'rb')
> <_io.BufferedReader name='C:\\Program
> Files\\Python36\\Lib\\site-packages\\pyarrow\\parquet.dll'>
> >>>
> >>> cdll.LoadLibrary('C:\\Program
> >>> Files\\Python36\\Lib\\site-packages\\pyarrow\\parquet.dll')
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "C:\Program Files\Python36\lib\ctypes\__init__.py", line 426, in
> LoadLibrary
> return self._dlltype(name)
> File "C:\Program Files\Python36\lib\ctypes\__init__.py", line 348, in
> __init__
> self._handle = _dlopen(self._name, mode)
> OSError: [WinError 126] The specified module could not be found
> {code}
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