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Re: [Help-glpk] Problem in GLPK

From: Aly Megahed
Subject: Re: [Help-glpk] Problem in GLPK
Date: Thu, 29 Apr 2010 19:11:57 +0400

Hi Xyron,

Thanks for your reply.

What do you mean by "exploiting the natural sparsity of my problem"? I mean, 
how is that done exactly in my example for instance?


----- Original Message -----
From: "glpk xypron" <address@hidden>
To: "Aly Megahed" <address@hidden>, address@hidden
Sent: Thursday, April 29, 2010 2:16:37 AM GMT -05:00 US/Canada Eastern
Subject: Re: [Help-glpk] Problem in GLPK

Hello Aly,

>   glp_malloc: no memory available
>   Error detected in file    \src\glpenv05.c at line 70
> The constraint that caused that error is:
>  s.t. Delivery_from_Same_Project{j in J, k in K, p in P, t in T: j!=k}:
> xx[j,k,p,t] ==0; 

columns that are always zero should not be defined.

Instead you should exploit the natural sparsity of your
problem to reduce the memory usage.

Best regards


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