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Questions tagged [cp-optimizer]

IBM ILOG CP Optimizer is a commercial constraint programming optimizer which is owned and sold by IBM.

IBM ILOG CP Optimizer is a commercial constraint programming optimizer which is owned and sold by IBM. It is included with IBM ILOG CPLEX Optimization Studio and is an alternative to traditional mathematical programming.

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How do we programmatically retrieve the software version number of CP Optimizer in OPL?

I'd like to include in my output the version of CP Optimizer (e.g. 12.9) used when solving. I'm working with problems solved under multiple versions of the software, so it'd be helpful to see which version was used while looking at the solution. I…
Jordan Ticktin
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How to put two elements in the same sequence?

I want to force the flexible job shop example model in CP Optimizer that if a specific mode/element is put in a sequence the successor has to be put also in the same sequence which means in this case that both have to be done on the same machine.…
Alex
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How to get current time in CP when using Intervals for scheduling

I am trying to schedule tasks in different machines. These machines have dynamique available ressources, for example: machine 1: max capacity 4 core. At T=t1 => available CPU = 2 core; At T=t2 => available CPU = 1 core; Each interval has a fixed…
mohamed HANDAOUI
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My question is about Resource constraint Project Scheduling Problem code in cplex. I am trying to apply Preemption to it

I am working on RCPSP and want to apply Preemption to it. I have divided the duration of every task into equal parts. Now after doing that I am unable to apply Precedence constraints to each of individual unit duration of a task. using CP; int…
Rahul Ghate
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guide me to write a capacity constraint

I am trying to add few more constraint with existing  resource constraint project scheduling problem available OPL examples. Here I am attaching the example files of RCPSP problem. At present in this example problem I can start as many tasks as…
Kumar J
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Worker Allocation in House Building Optimisation

As part of my thesis project, I was given a house building problem. There are 17 tasks in total and some tasks need to be completed before others. There are also 5 different worker types (builder, architect etc) and each task requires different…
Emir54
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Issues with using IloCP with too many workers

I have built a simple constraint enforcing that the value of a variable must be consistent with a modulo operation. Two consistency levels are available: bounds consistency and domain consistency. In this example, solving the problem with bounds…
Philippe Olivier
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Memory management in Cplex Concert Technology C#

I am trying to improve memory use by setting Memory Emphasis parameter on and Preprocessing parameter off. I found similar code for matlab and java but fail to do the same in c#. Memory optimization while using CPLEX library in…
Karen
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Java lang NoSuchMethodError : SwigDirector for cplex

For my first attemp to use CP Optimizer with java, when i run my program i get this error message : Exception in thread "main" java.lang.NoSuchMethodError: SwigDirector_IloIntValueEvalWrapper_eval at…
xfelt
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