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Re: [Help-glpk] numerical instability
From: |
Andrew Makhorin |
Subject: |
Re: [Help-glpk] numerical instability |
Date: |
Sun, 2 Oct 2005 12:39:25 +0400 |
> what can i do to solve this problem ????
>
> 0: objval = 0.000000000e+00 infeas = 1.000000000e+00 (0)
> 200: objval = 0.000000000e+00 infeas = 8.594496475e-08 (0)
> 222: objval = 0.000000000e+00 infeas = 2.257030868e-07 (227)
> spx_simplex: numerical instability (primal simplex, phase I)
The glpk simplex solver is not perfect. Try to disable scaling (by
default glpsol performs automatic scaling); if this will not help, try
to disable the lp presolver and then steepest-edge pricing.
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