[Numpy-discussion] Call for testing: full blas/lapack builds of numpy on windows 64 bits

Bruce Southey bsouthey@gmail....
Sat Feb 28 21:26:17 CST 2009

On Sat, Feb 28, 2009 at 12:57 PM, David Cournapeau <cournape@gmail.com> wrote:
> On Sat, Feb 28, 2009 at 7:01 AM, Bruce Southey <bsouthey@gmail.com> wrote:
>> Hi,
>> After much frustration and disabling my antivirus software (McAfee), I
>> was able to get the 'import numpy' to work and tests to pass as
>> expected. Of course after turning it back on and restarting the IDLE gui
>> a few times, the 'import numpy' crashes. This also happens on the
>> command line.
> Hm, let's assume this is a problem of the anti virus software, and not
> from mingw :) One way to test this would be to see if a binary built
> with VS 2008 would cause the same trouble.

Or just a Vista bug.

A possible option could be using wine64
(http://wiki.winehq.org/Wine64) . But is probably more work and if
even if it did work it may not be informative.

>> This is clearly related to the antivirus software because enabling or
>> disabling the 'on-access scan' is usually sufficient to failure import
>> failure or success, respectively. Perhaps some thing to do with MinGW on
>> Vista?
> Do you have this problem only with numpy ? I noticed those kind of
> crashes (right at import time) on my server 2008, but I really could
> not understand what was wrong - it crashes half of the time, and when
> it does not, it works perfectly (I could run the test suite 10 times
> without crash). Maybe some file-related failures and runtimes
> incompatibilities. There are so many combinations on windows which can
> influence this that I am perfectly fine with saying that Windows + AV
> is not supported:)
> David
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I virtually avoid windows for work so I can not answer your question.
I knew about the issues from another person trying to compile code
using WinGW on another almost identical 64 bit Vista system. Even the
related thread seemed to solutions that only worked for some people
and I do not know if a solution was found in that case.

Anyhow, I do agree that having Python 2.6 support is more important
than running the anti-virus software.


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