scipy error undefined symbol: lsame_

gerardob gberbeglia at
Mon Apr 19 19:15:35 CEST 2010

I installed scipy (and all the required libraries) and the following error
appears when i tried run a simple example which uses the optimize package of
scipy. I tried also numpy alone and it works ( at least for printing


Traceback (most recent call last):
  File "", line 2, in <module>
    from scipy import optimize
line 11, in <module>
    from lbfgsb import fmin_l_bfgs_b
line 30, in <module>
    import _lbfgsb
undefined symbol: lsame_
gberbeglia at actarus:~/python/mycodes>

Any ideas on how to solve this problem? Thanks.

PS: the example is below:

import numpy
from scipy import optimize

a = numpy.array([10,20,10])
print a

def f_(x):
	return x*x

x,f,d = optimize.fmin_l_bfgs_b(f_,[0.1],fprime=None, approx_grad = True,
bounds = [(-10000,10000)], iprint=30, maxfun=150000)

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