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Questions - ilog

Problem with reading Excel file in CPLEX OPL

I have a problem with reading the data from the excel file and getting the error message "Exception from IBM ILOG Concert: Problem accessing the Excel file". I am using the Cplex Version: 1...

sorour

cplex

opl

ilog

Votes: 0

Answers: 0

Why am I getting a seg fault with ILOG CP Optimizer

I am brand new to constraint programming and am trying to model my first problem as a constraint program using the ILOG CP Optimizer. I've installed ILOG Optimization Suite 20.1 and have successfully ...

NateA

constraints

cplex

cp

ilog

Votes: 0

Answers: 1

Latest Answer

You have a segmentation fault because unitTasks[j][0] is null pointer since your array initialization loop starts at 1. Also, you should try to compile in debug mode (without -DNDEBUG) and thus you wo...

Renaud Dumeur

IBM CPLEX - Warehouse location CP

I'm trying to run the scalablewarehouse example from IBM, with the CP algorithm, but when I add the using CP; to the mod file, I get an error on this line: dvar float Supply[Stores][Warehouses] in 0.....

drec4s

mathematical-optimization

cplex

constraint-programming

ilog

operations-research

Votes: 0

Answers: 2

Latest Answer

In Easy optimization see CPO with decimal decision variables using CP; {int} Warehouses = {1,2,3,4}; int NbStores = 5; range Stores = 0..NbStores-1; int scale=100; dvar int scaleSupply[Stores][Wareho...

Alex Fleischer

Why I receive an error when I apply "while" in cplex concert technology in c++?

I am using CPLEX concert technology in C++. As you can see in the code, when I want to employ "while" with the expression "LP-LB <=0", I face with the error of "expression ...

PedBel

c++

cplex

ilog

Votes: 0

Answers: 1

Latest Answer

It is because LP is of type IloNumVar. It doesn't have any specific value until after CPLEX has solved the problem, and even then you will need to ask CPLEX for the selected value of that variable. Yo...

TimChippingtonDerrick

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