"module could not be found" error

Robert Flintham Robert.Flintham at uhb.nhs.uk
Tue Mar 19 16:10:42 CET 2013


I'm trying to run the following, with <an array> representing an array of floating point numbers:

import numpy as np
import scipy as sp
from scipy import optimize

xdata=<an array>
ydata=<an array>

def t2fit(x,T2,A):
    return A * np.exp(-x/T2)

popt, pcov = optimize.curve_fit(t2fit, xdata, ydata, p0=None, sigma=None)

But I'm getting an ImportError:

Traceback (most recent call last):
  File "K:\eclipse\plugins\org.python.pydev_2.7.1.2012100913\pysrc\pydevd.py", line 1397, in <module>
    debugger.run(setup['file'], None, None)
  File "K:\eclipse\plugins\org.python.pydev_2.7.1.2012100913\pysrc\pydevd.py", line 1090, in run
    pydev_imports.execfile(file, globals, locals) #execute the script
 File "K:\eclipse\plugins\org.python.pydev_2.7.1.2012100913\pysrc\_pydev_execfile.py", line 38, in execfile
    exec(compile(contents+"\n", file, 'exec'), glob, loc) #execute the script
  File "K:\PROGRAMMING\MRI_Python\fatfrac.py", line 7, in <module>
    from scipy import optimize
  File "K:\Python33\lib\site-packages\scipy\optimize\__init__.py", line 147, in <module>
    from ._minimize import *
  File "K:\Python33\lib\site-packages\scipy\optimize\_minimize.py", line 29, in <module>
    from .lbfgsb import _minimize_lbfgsb
  File "K:\Python33\lib\site-packages\scipy\optimize\lbfgsb.py", line 40, in <module>
    from . import _lbfgsb
ImportError: DLL load failed: The specified module could not be found.

I've checked the path, and the file lbfgsb.py is definitely at that location (as are optimize.py and _minimize.py).  Does anyone know why I'm getting the error?

All the best,

Robert Flintham
Trainee Clinical Scientist - MRI

 +44 (0)121 371 7000


 Robert.Flintham at uhb.nhs.uk



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