Thank you so much. I misunderstood it. as i read more carefully your answer, now it is fixed.

Thanks again,

Farzaneh

On Mon, Jul 6, 2015 at 11:38 AM, Lutz Westermann wrote:

Farzaneh,

Can you provide more information about your problem (including a small example to reproduce it)? As I wrote before, the option pf4 was introduced with GAMS 23.1, so I don’t see an obvious reason, why it should not work with your version 24.1.

Best regards,

Lutz

On 7/5/2015 6:52 AM, Farzaneh wrote:

Hi Lutz,

I have same problem and still couldnt fix it. I use GAMS version 24.1

would you please help me through it?

thank you so much,

farzaneh

On Monday, February 27, 2012 at 1:25:18 PM UTC+3:30, Lutz Westermann wrote:

Markus,

If you are using a recent GAMS system you should see something like

this

in your log:

*** 6 Integer +INF Bounds have been reset to 100

So you are right that by default there is an upper bound of 100 on all

integer variables. With GAMS version 23.1 we introduced the parameter

pf4 to change this behavior. If you start your model like this

gams modelname.gms pf4=0

the upper bound for you integer variables will be +INF. Instead of this

you could also reset the upper bounds of your integer variables

manually

(e.g x.up(i,j)=200;). More information about the parameter pf4 can be

found here:

http://www.gams.com/docs/release/release.htm#23.1

I hope that helps,

Lutz

On 2/26/2012 11:53 AM, Markus Klems wrote:

Hello,

I am trying to solve a MINLP with 4 integer variables:

x1 between 1 and 20

x2 between 1 and 5

x3 between 1 and 5

x4 between 1 and 5

The equations have interaction terms and quadratic terms, i.e. x1

and x1^2.

The results of my optimization don’t seem to be correct (I tried

different solvers). I suspect that GAMS ignores the terms where the

integer range exceeds 100. At least, I read in the GAMS tutorial that

only integers between 0 and 100 are allowed. Does this limit apply to

the nonlinear terms stated above (x1 * x2, et cetera)? If this should

be the problem, is there anything I can do?

Thank you so much,

Markus

\

Lutz Westermann LWest...@gams.com

GAMS Development Corporation GAMS Software GmbH

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Lutz Westermann LWestermann@gams.com

GAMS Development Corporation GAMS Software GmbH

1217 Potomac St. NW, P.O. Box 40 59

Washington DC, 20007, USA 50216 Frechen, Germany

Fon/Fax: +1 202 342-0180/1 Fon/Fax: +49 221 949-9170/1

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