Installing the former version result:
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call
last)

/home/hassan/<ipython console> in <module>()

/home/hassan/Apps/sage-4.2.1/local/lib/python2.6/site-packages/sage/
numerical/mip.so in sage.numerical.mip.MixedIntegerLinearProgram.solve
(sage/numerical/mip.c:5059)()

/home/hassan/Apps/sage-4.2.1/local/lib/python2.6/site-packages/sage/
numerical/mipCoin.so in sage.numerical.mipCoin.solveCoin (patch/
mipCoin.cpp:934)()

AttributeError: MixedIntegerLinearProgram instance has no attribute
'isbinary'

and where to get the alfa version?

On Dec 9, 5:35 pm, Nathann Cohen <nathann.co...@gmail.com> wrote:
> A temporary solution is of course to use the FORMER version of the CBC
> package.
>
> To do so, please type :
>
> sage -fhttp://www-sop.inria.fr/members/Nathann.Cohen/cbc-2.3.p0.spkg
>
> But these early versions of MixedIntegerLinearProgram have been
> updated much since, so the best way for you is still to download the
> next version of Sage as soon as possible, and install with it the
> current version of CBC ( downloadable there 
> :http://sagemath.org/packages/optional/
> )
>
> Thank you for your interest in this class !! :-)
>
> Nathann

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