Hi Ali,
Thank you very much for your reply. Just a clarification, what do you mean that
glpsol would not solve MIP problem with less than 20 integer variables? Do you
mean that it takes a very, very long time? In term of hours or in term of days
to solve 20 integer variables?
Thank you.
Rdgs,
Paul
----- Original Message ----
From: Ali Baharev <[EMAIL PROTECTED]>
To: RC Loh <[EMAIL PROTECTED]>
Cc: [email protected]
Sent: Thursday, 26 June 2008 6:29:53
Subject: Re: [Help-glpk] Using lpx_integer for more than 200 variables
Dear Paul,
The number of integer variables is just one thing. I think i have a
MIP problem with less than 20 integer variables and glpsol would not
be able to solve it.
You should first improve and / or simplify your model rather than
change the code of the GLPK.
Or try a commercial solver such as ILOG CPLEX 10 and see what that can
do, it is not likely you could write a better (general purpose) solver
than that.
You should also try a higher version of GLPK because as far as i know
the MIP part was improved since 4.19.
Good luck,
Ali
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