Hello all, I want to make an update on this error, which is described 
already in these two threads:
https://groups.google.com/forum/#!searchin/archesproject/win32/archesproject/vDa04wCbKY4/H6AvwL0hOVoJ
https://groups.google.com/forum/#!searchin/archesproject/win32/archesproject/j3IRReGnrTA/2ia5P0m0_BsJ

I was installing arches on my Windows 7 system, and ran into this same 
problem when trying run the elasticsearch setup command (exactly as 
described by NHB Heritage in the second thread listed above).
(...)
  File 
"C:\Arches\ENV\lib\site-packages\django\contrib\gis\gdal\prototypes\ds.py", 
line 8, in <module> from django.contrib.gis.gdal.libgdal import lgdal
  File 
"C:\Arches\ENV\lib\site-packages\django\contrib\gis\gdal\libgdal.py", line 
47, in <module> lgdal = CDLL(lib_path)
  File "C:\Python27\Lib\ctypes\__init__.py", line 365, in 
__init__self._handle = _dlopen(self._name, mode) WindowsError: [Error 193] 
%1 is not a valid Win32 application

I reinstalled GDAL and made sure that the GDAL_LIBRARY_PATH setting was 
correct in settings.py.  Still got this same error.

Turns out, the real problem was that I was using Python 2.7.8 instead of 
2.7.6, and that was actually causing this error.  Once I installed the 
correct version of Python (which I get from here 
<https://www.python.org/download/releases/2.7.6/>), and recreated my 
virtual environment, I was able to get past this error.

Also, at first I forgot to re-add the GDAL_LIBRARY_PATH to my settings.py, 
and I got the following error (just for future reference):
(...)
  File 
"K:\arches\local\arches_env\lib\site-packages\arches\app\utils\data_management\resources\formats\shpfile.py",
 
line 5, in <module>
    from django.contrib.gis.gdal import DataSource
ImportError: cannot import name DataSource

To make everything clean, I reinstalled postgres (9.3.10) and postgis 
(2.2), and used stackbuilder (comes with postgres) to create the postgis 
template.  Everything works fine now.

Adam

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