Python 2.1 (#15, Apr 16 2001, 18:25:49) [MSC 32 bit (Intel)] on win32 Type "copyright", "credits" or "license" for more information. IDLE 0.8 -- press F1 for help

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from Numeric import * from LinearAlgebra import * a = array([[1,0],[0,1]]) print a, type(a) [[1 0] [0 1]] <type 'array'> eigenvectors(a) Traceback (most recent call last): File "<pyshell#4>", line 1, in ? eigenvectors(a) File "c:\program files\python21\numeric\LinearAlgebra.py", line 151, in eigenvectors dummy, 1, vr, n, work, lwork, 0) LapackError: Expected an array for parameter a in lapack_dge.dgeev

the above test works fine under unix environment using the same version of python and numpy