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[Help-glpk] Return value on mipgap problems

From: Joey Rios
Subject: [Help-glpk] Return value on mipgap problems
Date: Wed, 9 Apr 2008 17:07:05 -0700

Just a minor note.  When using a 'mipgap' value, ios_driver() will return GLP_ETMLIM if the mipgap tolerance is satisfied.  This causes the message "TIME LIMIT EXCEEDED; SEARCH TERMINATED" message to print from within glp_intopt().  Not a big deal, but it was confusing the first few times I saw it.  Ideally there would be a new return value for ios_driver(), say GLP_MIPGAPTOL (or whatever) and glp_intopt could print a more informative message based upon this new value.  The relevant sections of code are in glpios03.c, line 1346 for the mipgap check and glpapi08.c lines 345-373 for the switch statement on that return value for printing a message.

If I'm wrong about any of this, please update this thread and let me know.  Also, if any further details are needed regarding this issue, I'd be happy to provide them.


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