ImportError: DLL load failed using latest

[jamesfowkes]

I am building a GUI application that uses pandas for processing data. I am now trying to deploy this application using cx_freeze.

Initially I encountered the issue as described in #8602 and fixed by #8830.

I was using pandas as installed through pip. I used latest from GitHub and did a

python setup.py build --compiler=mingw
python setup.py

and I now get the following error when running the application:

Traceback (most recent call last):
  File "C:\Users\James\Documents\GitHub\CSVviewer\application.py", line 16, in <
module>
    from csv_datamanager import CSV_DataManager
  File "C:\Users\James\Documents\GitHub\CSVviewer\csv_datamanager.py", line 9, i
n <module>
    import pandas as pd
  File "C:\Python34\lib\site-packages\pandas-0.15.1.dev-py3.4-win32.egg\pandas\_
_init__.py", line 53, in <module>
    from pandas.io.api import *
  File "C:\Python34\lib\site-packages\pandas-0.15.1.dev-py3.4-win32.egg\pandas\i
o\api.py", line 14, in <module>
    from pandas.io.packers import read_msgpack, to_msgpack
  File "C:\Python34\lib\site-packages\pandas-0.15.1.dev-py3.4-win32.egg\pandas\i
o\packers.py", line 63, in <module>
    from pandas.msgpack import Unpacker as _Unpacker, Packer as _Packer
ImportError: DLL load failed: The specified module could not be found.

This error occurs when running the application with python (i.e. "normally") or with the built cx_freeze application.

I'm a bit lost for a fix, application/DLL stuff isn't my strong point.

Python version 3.4.2
Windows 7 32-bit
I believe I have the correct Visual Studio redistributable installed (2010).

[jreback]

I don't think you can compile on windows like this (e.g. using mingw). You need to use Visual Studio C++ 2010.

I posted these just now: https://github.com/pydata/pandas/releases
these are almost current master. They are built with numpy 1.9

give em a try and lmk

[jamesfowkes]

Right, of course. No point having VS2010 if I'm pointing the setup stuff at mingw. That's a leftover from an attempt to solve an earlier problem. Don't I feel stupid.

I've run the build again without --compiler=mingw and I can now run the application exe.