Questions tagged [opl]

OPL is a modeling language for mathematical programming and combinatorial optimization problems. It is the first modeling language to combine high-level algebraic and set notations from modeling languages with a rich constraint language and the ability to specify search procedures and strategies that is the essence of constraint programming.

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how to run a batch Slurm on a cluster node to run the CPLEX solver?

I have an account to run the OPL program on a cluster. My problem is i didn't know how I run a batch Slurm on a cluster node to run the CPLEX solver.
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1answer
95 views

Operator error in operating cost model constraint

I have built a model to minimize the operating cost and when I coded a model in CPLEX, it gave an error at Cons09: ...
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4answers
198 views

Book recommendations on OPL

Are there any good books that teach how to work with OPL in CPLEX? I searched but I didn't find any.
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1answer
141 views

Why some decision variables don't get values in Cplex?

I use this code in the cplex and don't know why some decision variables don't get value, I attach my code below. I don't know my model is wrong or my code? I haven't error in the code but have some ...
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1answer
87 views

How define variable in CPLEX and What is diffrence between decision variables and variable in CPLEX

I want to code a problem by CPLEX, in this problem I have variables and decision variables, how define them? In this picture you can see the variables: which we have: I use these codes for variables:...
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1answer
85 views

Coding the OR problem with cplex

I am new to using OPL. I wrote a CPLEX code for the vaccine distribution from a paper, it doesn't get an error, but it hasn't given the answer. I don't know its problem; please help me; I attached the ...
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1answer
48 views

Get array of sequences for array of interval arrays in OPL

So I want to define multiple sequences (an array of them). I have this: ...