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Description:
Support group for users of the Xpress-MP optimization software suite from Dash Optimization.
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 The Xpress community has moved
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This Xpress community forum has been relocated to the FICO Decision
Management Community.
[link]
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.... more »
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Stochastic Programming Module
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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?... more »
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E-1013 Infeasible constraint
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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... more »
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XpressMP on Leopard
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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... more »
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Converting a string to numeric?
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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... more »
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PLZZZZZZZZZ HELP
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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.
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Interpretation of the Solution
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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.... more »
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xPress Mosel IVE!
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Hello!
I'm a greenhorn in programming and modelling and I hope somebody could
help me!
I have the following problem with xPress Mosel IVE:
I have a linear program with the following side condition: (Transport
condition)
y1l >= LB1 or y1l = 0
l ... stands for distribution center or consumer... more »
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Optimization Libraries Student Version
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Hi there,
I was wondering if it is possible to obtain the Xpress Optimization
library for UNIX operating systems as a student version? I just need
the optimizer (and a mex interface), no fancy IDE.
Thanks,
Max
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