ModelStat = 8 vs. 1

GAMS
1

Hi all,

When solving a MIP in CPLEX, which is really the difference between:

Modelstat =1 - Optimal solution achieved.

and

Modelstat = 8 - Integer solution found.

Thanks in advance for any input.

Best,
SD

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2

Modelstat = 1 means that the solution is optimal and no better solution exists. Modelstat = 8 means that a feasible integer solution has been found but the process has been stopped by either limiting time criteria or number of iteration. Besides, if the integer solution satisfy the optcr or optca conditions the process stops and gives Modelstat = 8. To make the long story short the Modelstat = 8 does not insure the global optimum and there might be some answer better than what is found. For more info look at page 98 of gams help.
Omid

On Wednesday, October 21, 2015 at 8:58:05 AM UTC-5, sdeli wrote:

Hi all,

When solving a MIP in CPLEX, which is really the difference between:

Modelstat =1 - Optimal solution achieved.

and

Modelstat = 8 - Integer solution found.

Thanks in advance for any input.

Best,
SD

–
To unsubscribe from this group and stop receiving emails from it, send an email to gamsworld+unsubscribe@googlegroups.com.
To post to this group, send email to gamsworld@googlegroups.com.
Visit this group at http://groups.google.com/group/gamsworld.
For more options, visit https://groups.google.com/d/optout.