Opened 10 years ago

Closed 10 years ago

#3426 closed defect (fixed)

"import gdal" returns "ImportError: DLL load failed" in Python on Vista 32 bits

Reported by: nono Owned by: hobu
Priority: normal Milestone:
Component: PythonBindings Version: 1.6.1
Severity: normal Keywords:
Cc:

Description

Hello,

I tried to install GDAL with Python bindings, and I run into an error in Python when importing the module.

I work on Windows Vista 32 bits, and I followed the instructions: http://trac.osgeo.org/gdal/wiki/GdalOgrInPython First, I installed the GDAL Windows Binaries, and accordingly updated the PATH and created the GDAL_DATA environment variables. Then, I used the Windows installer GDAL-1.6.1.win32-py2.6.exe to set up Python bindings.

And when I try "import gdal", "import osgeo.gdal" or "from osgeo import gdal" from Python, I get the following error message:

Traceback (most recent call last):

File "C:\Python26\lib\site-packages\osgeo\gdal.py", line 7, in <module>

import _gdal

ImportError?: DLL load failed: Le module spécifié est introuvable.

I checked that the library _gdal.pyd is in the folder C:\Python26\Lib\site-packages\osgeo as it should, and it's there. I tried to add the path to that folder within Python in sys.path, but it does not solve the bug. I read in some discussion that Crystal Report should be uninstalled for some incompatibility reason, which I did without success...

Does anybody has an idea?

Regards,

Bruno G.

Change History (6)

comment:1 Changed 10 years ago by warmerdam

Component: defaultPythonBindings
Owner: changed from warmerdam to hobu

You wouldn't happen to be Kredik from IRC who had a similar problem this morning would you? If so, please close the ticket noting your solution.

comment:2 Changed 10 years ago by nono

Version: unspecified1.6.1

PS [reply to e-mail]: I'm not Kredik. Has he had exactly the same problem?

comment:3 Changed 10 years ago by warmerdam

That conversation seemed related, I'm not sure if it will be helpful:

<kredik> hi all, I am trying to build gdal with python support on windows ( vc2003 ). What version of python is supported ? 3.1.1 or 2.6.4 ? What version of swig should i use ?
* ue has quit (Ping timeout: 276 seconds)
* ue (~ue@89.28.120.79) has joined #gdal
<FrankW> kredik:  I think 1.3.39 is preferred.
<FrankW> That's swig.
<FrankW> I would suggest Python 2.6.4, though in theory trunk and 1.7 support 3.x as well.
<kredik> FrankW : few months ago I has successfully build gdal1.6.0 with python support. But It seems that with 1.7 things have changed. There is no more 'pymod directory.
<FrankW> The pymod directory contained the old bindings.  They are removed from 1.7.
<FrankW> Now you build python support in the gdal/swig/python directory.
<FrankW> http://trac.osgeo.org/gdal/wiki/GdalOgrInPython should have some details on building on windows half way down.
<sigq> Title: GdalOgrInPython - GDAL - Trac (at trac.osgeo.org)
<kredik> I can build something in swig/python with :
<kredik> python.exe setup.py build
<kredik> python.exe setup.py install
<kredik> I have added the bin path of my gdal install to the PATH, but I cant load the module from python
<FrankW> Do you get a specific error?
<kredik> >>> from osgeo import gdal
<kredik> Traceback (most recent call last):
<kredik>   File "<stdin>", line 1, in <module>
<kredik>   File "E:\DEV\GDAL_BUILD\3rdParty\Python26\lib\site-packages\osgeo\__init__.py", line 21, in <module>
<kredik>     _gdal = swig_import_helper()
<kredik>   File "E:\DEV\GDAL_BUILD\3rdParty\Python26\lib\site-packages\osgeo\__init__.py", line 17, in swig_import_helper
<kredik>     _mod = imp.load_module('_gdal', fp, pathname, description)
<kredik> ImportError: DLL load failed: Le module spÚcifiÚ est introuvable.
<kredik> >>>
<kredik> my dll is named gdal17.dll in the bin dir
<FrankW> Can you try, temporarily, copying gdal17.dll into c:\windows\system32? 
<kredik> I got the same error. 
<FrankW> funky
<FrankW> I'm rather at a loss I'm afraid.  Perhaps hobu can help? 
<kredik> do you know what is expected to be under the "site-packages\osgeo" directory ?
<kredik> FrankW: after a clean & rebuild it works now. thanks for your help.

comment:4 Changed 10 years ago by nono

Well I used the Windows installer of the version 1.6: http://pypi.python.org/packages/2.6/G/GDAL/GDAL-1.6.1.win32-py2.6.exe

When I download the source: http://pypi.python.org/packages/source/G/GDAL/GDAL-1.7.0.tar.gz and try to build it ("python.exe setup.py build"), I get an error from

running build running build_py running build_ext building 'osgeo._gdal' extension C:\Program Files\Microsoft Visual Studio 9.0\VC\BIN\cl.exe /c /nologo /Ox /MD /W3 /GS- /DNDEBUG -I../../port -I../../gcore -I../../alg -I../../ogr/ -IC:\Python26\include -IC:\Python26\PC -IC:\Python26\lib\site-packages\numpy\core\include /Tpextensions/gdal_wrap.cpp /Fobuild\temp.win32-2.6\Release\extensions/gdal_wrap.obj gdal_wrap.cpp C:\Program Files\Microsoft Visual Studio 9.0\VC\INCLUDE\xlocale(342) : warning C4530: C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc extensions/gdal_wrap.cpp(2813) : fatal error C1083: Cannot open include file: 'cpl_port.h': No such file or directory error: command '"C:\Program Files\Microsoft Visual Studio 9.0\VC\BIN\cl.exe"' failed with exit status 2

comment:5 Changed 10 years ago by nono

I meant, I get an error from VC compiler:

running build
running build_py
running build_ext
building 'osgeo._gdal' extension
C:\Program Files\Microsoft Visual Studio 9.0\VC\BIN\cl.exe /c /nologo /Ox /MD /W3 /GS- /DNDEBUG -I../../port -I../../gcore -I../../alg -I../../ogr/ -IC:\Python26\include -IC:\Python26\PC -IC:\Python26\lib\site-packages\numpy\core\include /Tpextensions/gdal_wrap.cpp /Fobuild\temp.win32-2.6\Release\extensions/gdal_wrap.obj
gdal_wrap.cpp
C:\Program Files\Microsoft Visual Studio 9.0\VC\INCLUDE\xlocale(342) : warning C4530: C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc
extensions/gdal_wrap.cpp(2813) : fatal error C1083: Cannot open include file: 'cpl_port.h': No such file or directory
error: command '"C:\Program Files\Microsoft Visual Studio 9.0\VC\BIN\cl.exe"' failed with exit status 2

C:\Users\Bruno\Desktop\GDAL-1.7.0>python.exe setup.py build
running build
running build_py
running build_ext
building 'osgeo._gdal' extension
C:\Program Files\Microsoft Visual Studio 9.0\VC\BIN\cl.exe /c /nologo /Ox /MD /W3 /GS- /DNDEBUG -I../../port -I../../gcore -I../../alg -I../../ogr/ -IC:\Python26\include -IC:\Python26\PC -IC:\Python26\lib\site-packages\numpy\core\include /Tpextensions/gdal_wrap.cpp /Fobuild\temp.win32-2.6\Release\extensions/gdal_wrap.obj
gdal_wrap.cpp
C:\Program Files\Microsoft Visual Studio 9.0\VC\INCLUDE\xlocale(342) : warning C4530: C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc
extensions/gdal_wrap.cpp(2813) : fatal error C1083: Cannot open include file: 'cpl_port.h': No such file or directory
error: command '"C:\Program Files\Microsoft Visual Studio 9.0\VC\BIN\cl.exe"' failed with exit status 2

comment:6 Changed 10 years ago by nono

Resolution: fixed
Status: newclosed

I managed to solve the problem, though I don't really understand how! After a couple of uninstall-reinstall, and installs of previous versions (through FWTools, OSGeo4W), it just started working.

Unfortunately, I ran on another bug: Python crashes whenever I try to read a raster file (using ReadAsArray?, or ReadRaster?). Someone had a similar problem: http://n2.nabble.com/Gdal-Python-Win7-crash-with-ReadAsArray-td4398401.html

But I'll open a new ticket.

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