I realized that sometimes in my model, the solution is not correct, so

i define a put, whith the

“Modelstat” to identify the problem. (Think this is the correct way to

do it)…

In most of the solutions the Modelstat value =1 (I think is meaning

OK),

but sometimes Modelstat value = 19 …

Can someone tell me what a modelstat=19 means, i dont find it…

Thanks!

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Here’s an excerpt from the McCarl GAMS User Guide (http://

lvps87-230-34-193.dedicated.hosteurope.de/mccarl/mccarlhtml/

index.html)

Value of Modelstat Indicated Model Solution Status

1 Optimal solution achieved

2 Local optimal solution achieved (Only type found in an NLP)

3 Unbounded model found

4 Infeasible model found

5 Locally infeasible model found (in NLPs)

6 Solver terminated early and model was feasible but not yet optimal

7 Solver terminated early and model was infeasible

8 Integer solution model found

9 Solver terminated early with a non integer solution found (only in

MIPs)

10 No feasible integer solution could be found

12 Error achieved â€“ No cause known

13 Error achieved â€“ No solution attained

14 No solution returned from CNS models

15 Feasible in a CNS models

16 Locally feasible in a CNS models

17 Singular in a CNS models

18 Unbounded â€“ no solution

19 Infeasible â€“ no solution

I guess in your case, the solver just couldn’t find a feasible

solution. Perhaps your parameters won’t allow for a solution at all?

Especially if all your others come up with an optimal solution, most

likely it’s a numbers problem in this case.

Regards

Chris

On 2 Feb., 11:38, nieBidon wrote:

I realized that sometimes in my model, the solution is not correct, so

i define a put, whith the

“Modelstat” to identify the problem. (Think this is the correct way to

do it)…

In most of the solutions the Modelstat value =1 (I think is meaning

OK),

but sometimes Modelstat value = 19 …

Can someone tell me what a modelstat=19 means, i dont find it…

Thanks!

\