Originally posted by: pentunia

I always end up with same error:
'import pycplex121
ImportError: DLL load failed: The specified module could not be found.'

ILOG CPLEX Teaching Edition version 12.1, Windows XP SP3, Python version 2.6.4, Numpy
I have rebooted and retried- same issues.
I'm suppose to learn these tutorials, but I'm having the hardest time :/

Sorry for the long post, I have tried so many things, spent soooo much time on this.
Summary of what I have tried:

INSTALL CPLEX ADD-INS FOR PYTHON:
I have followed a number of manuals,docs post etc, for instance:
C:\ILOG\CPLEX121tetrial\doc\ps_gscplex.pdf pg 236

1. Added a New Environment / System variable:
Variable name: PYTHONPATH
Variable value: C:\ILOG\CPLEX121tetrial\python\x86_win32
Have tried these values as well:
C:\ILOG\CPLEX121tetrial\python\x86_win32\lib
C:\ILOG\CPLEX121tetrial\python\x86_win32\lib\cplex

2. Open a cmd prompt window and enter these cmds:
cd C:\ILOG\CPLEX121tetrial\python\x86_win32
python setup.py install
running install
running build
running build_py
creating build
creating build\lib
creating build\lib\cplex
copying cplex\callbacks.py -> build\lib\cplex
<snip>
Writing C:\Python26\Lib\site-packages\cplex-12.1.0-py2.6.egg-info

Reply no errors, seems fine?

(I've also tried: python setup.py build --build-base=\ILOG\CPLEX121tetrial\python\x86_win32
and reinstalling all soft, etc )

3. Another doc said to, so I did:
Copy C:\ILOG\CPLEX121tetrial\bin\x86_win32\cplex121.dll
To: C:\ILOG\CPLEX121tetrial\examples\src\python\cplex121.dll

4. (pg 237) Open a cmd prompt window, type in:
python
import cplex
or
from cplex import *
or
import cplex as NAME

All give the same error:
<snip>
import pycplex121
ImportError: DLL load failed: The specified module could not be found.
5. Open a cmd prompt window and type in:
cd C:\ILOG\CPLEX121tetrial\examples\src\python
python
execfile("diet.py")

Reply: Always errors, for all .py files. Error msg's always end with:
File "C:\ILOG\CPLEX121tetrial\python\x86_win32\cplex\_internal\_pycplex.py", line 5, in <module>
import pycplex121
ImportError: DLL load failed: The specified module could not be found.

All same errors:
execfile("lpex1.py")
cpx.read("file.lp")
cpx = cplex.Cplex("file.lp")

Same errors if I use the Python command line and/or the Python IDLE (Python GUI)

The only files I could find name pycplex121 is pycplex121.pyd
google.com didn't find anything named pycplex121
I do have: C:\Python26\Lib\site-packages\cplex\_internal\_pycplex.py
when I try to run it, same error:
C:\Python26\Lib\site-packages\cplex\_internal>python _pycplex.py
Traceback (most recent call last):
File "_pycplex.py", line 5, in <module>
import pycplex121
ImportError: DLL load failed: The specified module could not be found.

6. I then tried using 'http://pycplex.googlecode.com/files/pycplex-2.0.zip'
After setting that up I ended up with thee same errors :(

7. I then try:
Copying pycplex121.pyd C:\ILOG\CPLEX121tetrial\python\x86_win32
Then in a cmd prompt window:
python
import cplex

Reply: same errors:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "cplex\__init__.py", line 149, in <module>
import callbacks
File "cplex\callbacks.py", line 47, in <module>
from _internal._aux_functions import apply_freeform_two_args, apply_freeform_one_arg
File "cplex\_internal\__init__.py", line 19, in <module>
import _list_array_utils
File "cplex\_internal\_list_array_utils.py", line 13, in <module>
import _pycplex as CPX
File "cplex\_internal\_pycplex.py", line 5, in <module>
import pycplex121
ImportError: DLL load failed: The specified module could not be found.

8. I then try:
import sys
sys.path.append("C:/ILOG/CPLEX121tetrial/python/x86_win32")
sys.path.append("C:\ILOG\CPLEX121tetrial\python\x86_win32")
import cplex

Reply: Same error

import pycplex121.pyd
same error

I then copy pycplex121.pyd to here:
C:\Python26\DLLs\pycplex121.pyd

Try again:
import cplex

Same error.
Thank you for taking the time to read this mess :)
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Originally posted by: SystemAdmin

Hello,

To use the Python API for CPLEX 12.1 on Windows, you must use Python version 2.5. An installer for this version of Python is available from the Python Software Foundation.

Regards,

Philip
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Originally posted by: pentunia

You're a star! :) Thank you Philip, that worked just perfect :)) Yay!
thank you thank you thank you :D
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Originally posted by: LJXue

Does anybody know when python 2.6 will be officially supported?
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Originally posted by: SystemAdmin

Python 2.6 will be supported on Windows, Linux, and Mac OS with the next release of CPLEX, which will be available this quarter.

Are there new features in Python 2.6 that you particularly want to use in combination with CPLEX?

Philip Starhill
CPLEX Research Engineer
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Originally posted by: LJXue

Hi, Philip, thank you very much for your answer.

Not really. I just migrated from Matlab to Python recently, and all my environments are based on python 2.6, which prevented me from using cplex. Currently, I am using pycplex http://code.google.com/p/pycplex/ as a work around. However, I do hope to have official support of python 2.6.
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Originally posted by: NellyMonserrat

Hi everybody. 

I've heard  that pypy is a fast, compilant alternative implementation of python languaje, since I have a model coding in python, I'm trying to use it, but I have problems linking it to cplex. Does anyone have idea of how do it? Cplex is already link with python, so, when I run the program with just python, everything is ok, but when I try to used pypy I get this error: ImportError: No module named cplex. the thing is that cplex is already in the path, look:

>>>>sys.path

['', '/usr/lib/pypy/lib_pypy/__extensions__', '/usr/lib/pypy/lib_pypy', '/usr/lib/pypy/lib-python/2.7', '/usr/lib/pypy/lib-python/2.7/lib-tk', '/usr/lib/pypy/lib-python/2.7/plat-linux2', '/usr/local/lib/pypy2.7/dist-packages', '/usr/lib/pypy/dist-packages', '/usr/lib/pypy/dist-packages/cplex/lib/python/cplex']
 

but when I am importing cplex, I get this message:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "cplex/__init__.py", line 43, in <module>
    import callbacks
  File "cplex/callbacks.py", line 48, in <module>
    from _internal._aux_functions import apply_freeform_two_args, apply_freeform_one_arg
  File "cplex/_internal/__init__.py", line 22, in <module>
    import _list_array_utils
  File "cplex/_internal/_list_array_utils.py", line 13, in <module>
    import _pycplex as CPX
  File "cplex/_internal/_pycplex.py", line 19, in <module>
    _pycplex_platform = swig_import_helper()
  File "cplex/_internal/_pycplex.py", line 15, in swig_import_helper
    _mod = imp.load_module('_pycplex_platform', fp, pathname, description)
  File "cplex/_internal/_pycplex_platform.py", line 39, in <module>
    from cplex._internal.py1013_cplex1251 import *
ImportError: No module named cplex._internal.py1013_cplex1251

 

Does anyone have idea of what's happening? Thanks in advantage 

 

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Is this the same question as asked here?

You should not ask the exact same question in multiple threads. And if you do that, then you should at least cross-reference the questions.

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