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 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

The problem maybe the fact that, at the origin, variables are declared
GLP_DB. Then after, they are declared GLP_FX creating the bug.


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