Re: [Help-glpk] problem with dual

[Andrew Makhorin]

> How can I get the upper bound for the rows?

With glp_get_row_ub. However, rows in your instance have no upper
bounds.

> 
> 
>   No.   Row name   St Activity  Lower bound Upper bound Marginal
> ------ ------------ -- --------- ----------- ----------- --------
>     1 constraint1  NL        48          48                  0.2
>     2 constraint2  NL        35          35                  0.5
>     3 constraint3  NL        24          24                  0.5
>     4 constraint4  NL        10          10                  0.5
>     5 constraint5  NL         8           8                    1
> 
> 
> 0.2
> 0.5
> 0.5
> 0.5
> 1
> 

These values are row duals, not upper bounds.

Please consult any tutorial on lp basics.