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Re: [Help-glpk] [Fwd: Providing initial solution]

From: Heinrich Schuchardt
Subject: Re: [Help-glpk] [Fwd: Providing initial solution]
Date: Tue, 17 Sep 2013 15:25:07 +0200 (CEST)

Hello Juan,

your mail had to be forwarded manually, because you are not subscribed to the 
GLPK help list.

A segmentation fault should not arise inside the GLPK library even if memory is 
depleted. Could you, please, run your problem with Valgrind to identify the 
location of the incorrect memory access.

>> possible to give to GLPK an initial solution 
Please, indicate if you try to solve a LP or a MIP problem.

Best regards

Heinrich Schuchardt

> Gesendet: Dienstag, 17. September 2013 um 14:10 Uhr
> An: address@hidden
> Betreff: [Help-glpk] [Fwd: Providing initial solution]
> -------- Forwarded Message --------
> Subject: Providing initial solution
> Date: Mon, 16 Sep 2013 18:37:00 -0400 (EDT)
> Dear all,
> I have a big size problem to be solved in GLPK (around 400000 rows and 1 
> million columns). The last simulation I run to solve this problem, I got a 
> segmentation fault because of the size of the problem. I was wondering if it 
> is possible to give to GLPK an initial solution to the problem I am trying to 
> solve so that the number of iterations the solver has to do afterwards is 
> decreased, and be able to get a solution.
> Is this possible? how would be the way to do it? I didn't see this  explained 
> online or in the user's manual.
> Moreover, do you think decreasing the tolerance would help in this case?
> Many thanks,
> Juan

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