[SciPy-dev] test_arpack errors on 64bit Linux

Aric Hagberg hagberg@lanl....
Thu Aug 14 19:41:37 CDT 2008


On Thu, Aug 14, 2008 at 01:26:28PM -0700, Jarrod Millman wrote:
> I am getting test_arpack errors on 64bit Linux, but not 32bit Linux.
> Is anyone else seeing this?  I would like to get these fixed before
> releasing the 0.7.0b1.

I can verify that I get errors in the same tests - but slightly
different errors.  I see an info=-8 and info=-9999 return form ARPACK
in addition to info=-9 

c          = -8: Error return from LAPACK eigenvalue calculation;
c          = -9: Starting vector is zero.
c          = -10: IPARAM(7) must be 1,2,3,4.
c          = -11: IPARAM(7) = 1 and BMAT = 'G' are incompatable.
c          = -12: IPARAM(1) must be equal to 0 or 1.
c          = -9999: Could not build an Arnoldi factorization.
c                   IPARAM(5) returns the size of the current Arnoldi
c                   factorization.


I'm also seeing some other errors e.g

======================================================================
FAIL: test_dot (test_blas.TestFBLAS1Simple)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/u/aric/lib/python/scipy/lib/blas/tests/test_blas.py", line 69, in test_dot
    assert_almost_equal(f([3,-4,5],[2,5,1]),-9)
  File "/nh/u/aric/lib/python/numpy/testing/utils.py", line 207, in assert_almost_equal
    assert round(abs(desired - actual),decimal) == 0, msg
AssertionError: 
Items are not equal:
 ACTUAL: 0.0
 DESIRED: -9

Is there some LAPACK/BLAS issue?


Aric 


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