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[Bug-glpk] [Fwd: Re: index not getting created]


From: Andrew Makhorin
Subject: [Bug-glpk] [Fwd: Re: index not getting created]
Date: Mon, 02 Feb 2015 18:14:18 +0300

-------- Forwarded Message --------
From: Pawan Aurora <address@hidden>
To: Andrew Makhorin <address@hidden>
Subject: Re: [Bug-glpk] index not getting created
Date: Mon, 02 Feb 2015 14:53:10 +0005

Hi,


Thanks for the prompt reply. While constructing an example I realized
that the mistake that I was making was in the format of the variable
name. I was using parenthesis instead of square brackets. Parenthesis
are used in the cplex lp format but not by default.




Regards,
Pawan


On Mon, Feb 2, 2015 at 5:07 PM, Andrew Makhorin <address@hidden> wrote:
> On Mon, 2015-02-02 at 07:41 +0005, Pawan Aurora wrote: 
>         I am creating a problem object from a model using the
>         appropriate apis. However, the index that I create for this
>         object does not seem to work. Since when finding a column by
>         its name it returns 0 although the variable by that name does
>         exist. When using the same model and data files I use glpsol
>         to write the problem in cplex lp format to a file. Now when in
>         my program I get the problem object from this file, the index
>         seems to work since the search now returns the correct number
>         of the variable. Is there any reason why this happens or is
>         this a bug in glpk? Thanks in advance.
> Most likely the string you passed to glp_find_col differs from the
> column name you assigned. Please check this more carefully. Note that
> to compare strings glpk uses strcmp, so non-standard (non-C-locale)
> coding may affect the comparison result. If you still think this is a
> bug, please provide an example. Thanks.





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