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Description:
Support group for users of the Xpress-MP optimization software suite from Dash Optimization.
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 Welcome
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Welcome to Dash Optimization`s Google group for the Xpress-MP optimization suite. It is our intention that this group provide a forum of support for users of Xpress-MP. Dash Optimization offer an Annual System Support Contract (ASSC) which provides comprehensive support services and software updates. It... more »
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Batch files using Console Optimizer
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Hello,
I am using XPRESS optimizer on Linux. I am not Linux savvy but I want
to run a shell script that runs a bunch of .LP format files. I wrote a
sample shell script to run one file as follows:
optimizer
test
readprob test.lp
minim
global
writeprtsol
When I run the shell script, the Optimizer is asking me for a problem... more »
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solution time reduction in case of Mixed- Integer- Programming
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Dear all,
does anyone know how to save solution time, and if there is a method
to relax a problem for XPRESS?
Our instructor gave us a project on site construction and
transportation cost minimization that takes quite long time to solve
(15 min). The problem is to reduce this time and a was wondering if we... more »
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How to save output
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Hi
Hope somebody can help me with this:
Is there any way to save the stats from running a MIP model? Like the
best solution, solution time, best bound and so forth? Or a printout
of the BB-tree and the MIP search?
And how can I write the output to a file and get it saved?
Thank you in advance... more »
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How to get the number of nodes?
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Dear
I'm using Xpress-IVE to solve integer programming.
The question is, how to get the number of nodes solved so far in
Xpress-IVE?
thanks.
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Garbage Collection in Mosel? How to free memory??
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How can I undo the declaration of variables, respectively,
constraints, if they becom superfluous? I don't want to override them,
I want to delete them and free related memory! Anyone an idea?
Thanks a lot!!!
-------------------
This thread replaces the undermentioned:
"Hi! My optimization model is extended stepwise, that is, it is set-up... more »
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Ln() function in the objective
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Hi,
I am doing an entropy optimizing problem where the objective is
defined to be:
-PROB(p,q)*ln(PROB(p,q))
PROB(p,q) are MPVAR
Some are the probabilites are restricted to be zero. How do I set this
objective function to zero when a PROB(p,q) is zero?
Thanks
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Updating constraints in a minimizing problem
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!!!!! CONSTRAINT !!!!!
forall(i in insI,j in insJ,l in insI,m in insJ |
exists(isgreater_aux(i,j,l,m)) and isgreater_aux(i,j,l,m)=true)
sum(k in insK)k*x(i,j,k) >= sum(k in insK)k*x(l,m,k) +1
!!!!! after I call a cicle !!!!!
forall(i in insI) do
forall(j in insJ) do
forall(l in insI) do... more »
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Xpress-MP and the .NET enviroment,
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Hi,
i wonder what connections between Xpress-MP and the .NET enviroment
exist. Would i be able to call Xpress-MP solvers from a .NET language?
Thanks,
Tomas
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error 108
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z:=sum(i in FIVE, j in FIVE, k in FIVE|y(i,j)=k) x(i,j,k)
logical expression expected before the last "x"
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