Andrew Makhorin wrote:
>
>>> I don't use functions glp_read_lp or glp_read_cpxlp.
>
>>> And, I use GLP_FX (not GLP_DB) to fix bounds for the first variable.
>
>>> So, I don't understand.
>
>>> And, when I use lpx_write_cpxlp, I obtain this result.
>
>>> The problem is that variables aren't integer and the first variable
>>> bound
>>> is
>>> displayed as 1 <= Yi0_copy <= 1
>
>> It is strange, because glp_write_lp (lpx_write_cpxlp) writes fixed
>> variables as <varname> = <fixed value>; it writes both bounds only if
>> the variable is double-bounded.
>
>
>> I test variable sense after this command
>> glp_set_col_bnds(glpkProbPtr,id+1,GLP_FX,dlb[id],dub[id]) and this
>> test show that variables are double-bounded instead of fixed
>
> Hmm... There is something wrong. Please print the type and bounds
> of the variable reported by glp_get_col_type, glp_get_col_lb, and
> glp_get_col_ub immediately after glp_set_col_bnds(... GLP_FX ...).
> The type reported must be GLP_FX = 5. If not, please check your code.
>
> Hi,
>
> I check my code and I resolve my problem. But, an other problem appear.
>
> When I fix a variable at one, and after, I define the type as binary, then
> the lower bound is 0 instead of 1.
>
> I resolve this problem in declaring variables as integer. But, why
> glp_set_col_kind redefine the lower bound
>
> Thanks
>
> Cédric
>
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>
>
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