Re: [Help-glpk] GLPK Maximum row limit error

[Heinrich Schuchardt]

Hello Vignesh,

the number can be raised. Simply do not expect GLPK to solve a problem of that 
size in reasonable time.

Scripts to compile the modified code are provided with the source. The Windows 
build files are in directory w64 (and w32).

Best regards

Heinrich Schuchardt

http://www.xypron.de


On 11.12.13 at 12:15, Vignesh Sridharan wrote:

> Hello,
> 
> 
> 
> I am using GLPK to create an LP file which I will later optimize using CPLEX.
> 
> But while I am creating the LP file, the following error occurs.
> 
> #####
> 
> glp_add_rows: nrs = 186919944; too many rows
> 
> error detected in file ..\src\glpapi01.c  at  line  251
> 
> #####
> 
> 
> 
> I checked the resepectiv .C file and found that GLPK has a row limit of 
> 100000000. Can this limit be changed ?
> 
> Could you help me with a way around this issue ?
> 
> For the back ground. This model is a energy systems model on the likes of 
> MARKAL in open source. This problem occurs when I am trying to model the 
> whole of Africa's energy system (more than 10 countries at a time). My GNU 
> Mathprog code is 470 line long and my data file is 1000000 lines long.
> 
> 
> 
> thanks
> 
> vignesh
> 
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