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Re: [Help-glpk] "The conflict graph is either empty or too big"

From: spiritfire
Subject: Re: [Help-glpk] "The conflict graph is either empty or too big"
Date: Tue, 22 May 2012 16:40:07 -0700 (PDT)

What about increasing the error? I don't really care about having the optimal
solution, I do not need such a precision.
How can I change it ? Because if I stop it before it finds the optimal
solution, than I get no results.... I whish to be able to view a solution
even if it is not the optimal one.

Does anybody knows if such an option is possible ?

spiritfire wrote:
> Hi, 
> I'm running a simulation and it's taking quite a while...
> I'm running on Gusek, which is the only way I found to use GLPK (couldn't
> figure out how to install on win)
> The program seems to found a solution :
> Integer optimization begins...
> Gomory's cuts enabled
> MIR cuts enabled
> Cover cuts enabled
> Clique cuts enabled
> Creating the conflict graph...
> The conflict graph is either empty or too big
> But then it goes on searching for quite a while :
> simul.mod 
> Time used: 1294.0 secs.  Memory used: 55.1 Mb.
> +176120: mip =     not found yet >=  5.813433080e+004        (195; 6)
> +176321: mip =     not found yet >=  5.813433080e+004        (196; 6)
> I have no clue if it's close to the solution, if it's taking too long or
> if I should wait or ... ?
> Does anybody know if it is normal ?
> my code is attached.
> Thank you.

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