Xpress-MP Google Group

The Xpress community has moved

2009-06-16T14:15:13Z

This Xpress community forum has been relocated to the FICO Decision
Management Community.

We hope that you will join us there to post questions, comments, ideas
and engage in discussion related to Xpress, Optimization and the wider
area of Decision Management.

Stochastic Programming Module

2009-06-07T17:07:41Z

Hi all,

I have been using the "mmsp" module for solving a multistage recourse
model. I have been searching on the website to find the underlying
algorithm(s) that are used by this module. Can anyone help?
I believe that the recourse model is reset as a large scale LP
equivalent en solved accordingly. Is this correct?

Re: XpressMP on Leopard

2009-06-04T19:59:20Z

install and keep another OS just to run Xpress"
yes i agree with u 100%..But...,,Try Vmware in linxu so that u can switch
into WIN/Linux at the same time....To use Vmware u will have to enable the
VT option in your motherboard.

Re: XpressMP on Leopard

2009-06-03T14:40:02Z

Dear Chris and Vimek

Thanks for yours answers. I confess it's a bit uncomfortable to
install and keep another OS just to run Xpress, but since I love
Xpress and
since it is much faster than Cplex 11.0 for Mac OS X, I have no choice.
All the best,

Daniele

--
Dr. Daniele Catanzaro,

Re: XpressMP on Leopard

2009-06-03T14:08:33Z

USE WINE TO INSTALL WIN APPLICATION INTO LINUX

Re: XpressMP on Leopard

2009-06-03T13:29:24Z

There are no plans to port Xpress to the Mac, although we would
certainly consider it if there were enough commercial interest.

Chris.

E-1013 Infeasible constraint

2009-05-26T17:39:55Z

I'm getting the error E-1013 Infeasible constraint in my model with
code on line 78: "sum(l in T)M(i,l,1)*l+sum(j in E,l in T)P(i,j,l,1)
*l>=Es(i)" How can I solve this?

This is the code for my model=

model Carpool
uses "mmxprs"; !gain access to the Xpress-Optimizer solver

!optional parameters section

XPRS_TOP and XPRS_LIN

2009-05-24T17:08:28Z

Hello

What is the difference between XPRS_TOP and XPRS_LIN?

Thanks

XpressMP on Leopard

2009-05-22T14:07:37Z

Dear Madam, Sir

may I ask you whether there is any chance to see XpressMP running on
Mac Os X in the next months?

I do not refer explicitly about the porting of Xpress-Ive (which
however make the development really easy), what is
really important to me is the possibility to use XpressMP on mac os x

Converting a string to numeric?

2009-05-11T18:32:33Z

Hi guys

I need some help. I have a file with both numeric and character data.
and i imported these to a 2d array(of type string) in mosel.

Now, this is what I wanna try...

Can I access a column from this array and then extract the numeric
value (in effect i wanna convert the string type info to numeric data

Re: PLZZZZZZZZZ HELP

2009-05-11T17:23:06Z

I am not sure if I did understand the question... but if what you want
is to load an array from a dat file you can do it by means of for
loops as:

forall(a in 1..A,b in 1..B) do
read(D(a,b))
end-do

You do not need to strictly start from 1.

Re: xPress Mosel IVE!

2009-04-28T08:24:14Z

Hey!

Please, if somebody knows anything to this problem, help me!

Best regards,

Mags

Interpretation of the Solution

2009-04-15T17:01:02Z

Hi,

I have used Xpress in my dissertation and must interpret my results
properly. In the book as well as in the net I could find nothing the
fitting, for this reason the last attempt is to write here.

Please, explain me how to interpret the Rows (constrains), Columns
(variable), Non-zero elements as well as Simplex iterationens.

Interpretation of the Solution

2009-04-15T16:59:59Z

Hi,

I have used Xpress in my dissertation and must interpret my results
properly. In the book as well as in the net I could find nothing the
fitting, for this reason the last attempt is to write here.

Please, explain me how to interpret the Rows (constrains), Columns
(variable), Non-zero elements as well as Simplex iterationens.

RE: Optimization Libraries Student Version

2009-04-15T10:20:34Z

The library APIs are currently only available through the Academic Partner Program which grants full licenses of the software to degree awarding institutes that teach at least one course with Xpress.

On Windows, some access to the solver API is provided as part of the Microsoft Solver Foundation v1.2 which will be released this week.