Re: [Bug-glpk] Problem in the MIP problem

[Cedric[FR]]

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 surprising because, when I use get_get_col_kind, variables are
integers.

PS: I use GLPK 4.28. I can try to use the last version.

\* Problem: spConf_ *\

Minimize
 Objectif: - 11.6666666666667 Yi0_copy - 11.6666666666667 Yi1_copy
 - 5 Yi2_copy - 5 Yi3_copy - 2.7 Yi4_copy - 4.6 Yi5_copy - 4.6 Yi6_copy
 - 4.6 Yi7_copy - 21.5 Yi8_copy - 21.5 Yi9_copy

Subject To
 RTBH____: + 9 Yi9_copy + 9 Yi8_copy + 4 Yi7_copy + 4 Yi6_copy
 + 4 Yi5_copy + 2 Yi4_copy + 2 Yi3_copy + 2 Yi2_copy + 7 Yi1_copy
 + 7 Yi0_copy <= 10

Bounds
 1 <= Yi0_copy <= 1
 0 <= Yi1_copy <= 1
 0 <= Yi2_copy <= 1
 0 <= Yi3_copy <= 1
 0 <= Yi4_copy <= 1
 0 <= Yi5_copy <= 1
 0 <= Yi6_copy <= 1
 0 <= Yi7_copy <= 1
 0 <= Yi8_copy <= 1
 0 <= Yi9_copy <= 1

Generals
 Yi0_copy
 Yi1_copy
 Yi2_copy
 Yi3_copy
 Yi4_copy
 Yi5_copy
 Yi6_copy
 Yi7_copy
 Yi8_copy
 Yi9_copy

End


Andrew Makhorin wrote:
> 
>> in particular, in the cplex lp file Yi0_copy should be
>> specified as follows:
> 
>> Bounds
>>  Yi0_copy = 1
> 
> This is not necessary, because glp_read_lp correctly set the types
> of variables having identical lower and upper bounds to GLP_FX.
> 
> 
> 
> _______________________________________________
> Bug-glpk mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/bug-glpk
> 
> 

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