How to printf the optimization gap

[Hililielala]

Hello,
I need to print the optimization gap when my program finishies due to timelimit.
I have been looking for this answer a lot and I can not find it. I have already tried

suffix absmipgap OUT;
display <name of the objective function>.absmipgap;

but it returns always zero, even if the message is "CPLEX 12.6.0.0: time limit with integer solution; objective 7.9"

Thank you very much if anyone could help me.
H.

[Robert Fourer]

Before solving, you need to set

 

   option cplex_options 'return_mipgap 3';

 

or add 'return_mipgap 3' to the cplex_options string that you're already using.  Then you can display the values of <obj>.absmipgap and <obj>.relmipgap.

 

Bob Fourer

am...@googlegroups.com

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