AIMMS - The Modeling System Google Group

Store a matrix

math...@gmail.com (Rafael Silva) — Fri, 25 May 2012 12:52:15 UT

Hi all

I'm running a model k-times for different values of a single parameter, so
at the stage k,

I would like to store the result of the all the matrix *area(i,j) *(an not
the single value for i,j)* *in a vector *p_area(k)*, is that possible?

Thanks in advance

--
Rafael Silva

How to set the data order

libaobao2...@gmail.com (icefrancis) — Thu, 24 May 2012 10:10:21 UT

Dear all,

I have a sql table with data :
{1,2,3,4,5,6,7,8,9,10,11,12,13 ,14,15,16,17,18,19,20}, but when I map
to a set :ODpoint, it turns to:

ODpoint: {1,10,11,12,13,14,15,16,17,18, 19,2,20,3,4,5,6,7,8,9},
normally it does not matter, but in my model these numbers have some
connection, e.g. (1,20),(2,19) are pairs, and I have couples of

read data

shiwang....@gmail.com (King) — Wed, 23 May 2012 18:49:06 UT

Hi,

I got an error message
The index "i" present in a(r, i) is not present in the previously
generated entry (b(r)) of this read statement. AIMMS generates
communication links when they are not explicitly specified between the
keywords read/write and from/to. These entries are constructed by

Solvers Running Times

ursulachall...@gmail.com (ursula challita) — Tue, 22 May 2012 06:52:04 UT

Hi all,

I am comparing solvers running times for different problems.
In a Binary Integer Problem, solver X had less running time.
For another Combinatorial Integer Proble, Solver Y had less running
Time.

How can I know which solver had a faster response? Is this difference
due to the nature of the problems or not necessary?

GenerateRobustCounterpart

michal_rozenb...@yahoo.com (Michal) — Mon, 21 May 2012 09:14:36 UT

Hi,

I am trying to create a robust counterpart MATHEMATICAL PROGRAM of my LP
model. I have read chapter 20 regarding Robust Optimization and understood
that I need to call the GMP function GenerateRobustCounterpart.
I have declared a procedure with the following body:
GMP::Instance::GenerateRobustC ounterpart(ProductionPlan,Dema nd(t),,[RC])

Uniform Distribution

ursulachall...@gmail.com (ursula challita) — Sun, 20 May 2012 16:06:28 UT

Hi all,

I want to create an area in which there are users. I wnat these users
to be uniformly spaced.
I looked in the functions that are available in AIMMS and couldn't
find the one I want.
Any help how I can do this?

Thanks in advance
Ursula

error

ralys.egidi...@gmail.com (egidukas) — Thu, 17 May 2012 19:31:05 UT

Hi,
I have few problems installing my new trial licence. How to install
it? I delete the old one, but when I try to instal the new, the system
renew the old, so I cant install the new licence. It's because of the
same licence number 001.001.132.001, but I have another code for
licence, but I cant find anywhere where to renew it.

Error related to Horizon identifier

themowo...@gmail.com (Mo) — Tue, 15 May 2012 05:22:02 UT

Hi,

I received the following error while running MIP model in AIMMS:
The current period value '' is not an element of horizon "StartTime".

Could you please let me know why this error is occuring and also let me
know how I can resolve it?

Thanks,
Mo

Model status 13: Error no solution, Solver status 10: Error: Solver Failure

merel_fe...@hotmail.com (Merel) — Mon, 14 May 2012 14:58:54 UT

Hi guys,

Could you please help me out.
I receive the following error/warning when running my MIP model in
AIMMS.

Warning: Model Status 13: Error no solution, Solver status 10: Error:
Solver failure (see message window).

Thanks in advance!!

Regards,
Merel

Difference in solvers output

ursulachall...@gmail.com (ursula challita) — Mon, 14 May 2012 07:12:25 UT

Hi all,

I am working on comparing two solvers (gurobi and cplex).
I built an LTE network planning problem in AIMMS, however, sometimes
the selected base stations are different (knowing that the objective
is the same). Why is that??
I would really appreciate any help.

Thanks in advance,
Ursula

Problems about reducing the scenario tree size and the number of scenarios in stochastic programming

wateryi...@gmail.com (Yilin Wang) — Fri, 11 May 2012 11:03:14 UT

Hi everyone,

I am a student from sydney uni, now I confront some major problems
with reducing the scenarios number in my program.

My program is a 24 stages stochastic program, since even with minimum
child branches (2) in each stage, the scenario tree is still
too big to be solved, so I made some contribution probability of

Duplicating a model

themowo...@gmail.com (Mo) — Fri, 11 May 2012 08:03:46 UT

Hi,

I am looking at saving my existing model with a different name - similar to
"save as" in MS word.

Following this I tried to use "save as" but it saves as .amb or .aim file.
However I want to save a .prj file so I can continue to work on the newly
saved model.

Is there any solution to this? (If the existing model is too long then it

Stop criteria for basic AOA alg

erica.y...@gmail.com (erica ye) — Wed, 09 May 2012 16:13:54 UT

I saw the AOA objective and best solution in the process window. But
it continues to iterate. How can I set the max iteration for the base
AOA algorithm?
Thanks

Changes for upper and lower bound for second AOA doesn't work

erica.y...@gmail.com (erica ye) — Wed, 09 May 2012 15:50:33 UT

The RegTaps(r,p) and StatesCap(c) are integer variables. It seems the
second AOA is doesn't run as expected.
Is there something wrong?
RegTaps(r,p).Lower := 12;
RegTaps(r,p).Upper := 12; ! Upper and Lower bounds are
same, three integer variables are left
StatesCap(c).Upper :=0;
gmp1 := GMP::Instance::Generate( myMP ) ;

How to learn AIMMS faster?

tianyuxin1...@163.com (bmfw) — Wed, 09 May 2012 11:26:59 UT

Hi,
I'm a newcomer and I will establish a project through AIMMS,
however, there are too many PDFs to read.
Can anybody give me some tricks?
Ths.
kind regards.

bmfw