Re: [Help-glpk] numerical instability

[Andrew Makhorin]

> 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.