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CPLEX Optimization Studio

Showing 24

Nonlinear solver for CPLEX

Add nonlinear optimization capability to CPLEX. Many real-life models are nonlinear by nature. CPLEX solver requires a linear model to work. A good nonlinear solver can often times overperform a linearized form of a real-life model. Having a nonli...
over 4 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Future consideration

Enhance .NET API for maps

When attempting to use the reflection mechanism of OPL CPLEX API under .NET (version 12.9 but same problem seen in documentation of latest version), I stumble upon an error on my first implementation of a missing method "NbDim" for the map class "...
over 1 year ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Future consideration

Add support for Java 11 in CPLEX java API

Currently, CPLEX and CPO provide a java API to the engines. This API currently supports Java 8 (IBM SDK and Oracle Java). A more recent versions of Java with LTS is Java 11 - It would be nice if CPLEX Optimization studio officially supports Java 1...

CPLEX: Make adding mulitple objectives consistent with adding one objective

In the Java API for CPLEX (presumably similar in other APIs), it is possible to create an objective and add it to a model in one function call, using overloads of IloCplexModeler.addMinimize() and .addMaximize() that take an IloNumExpr argument. D...
almost 2 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Future consideration

Allow initialisation using OPL of arrays within tuple sets

In OPL it is not possible to initialise an array which is within a set of tuples either through values or programmatically. An enhancement should be made to OPL to allow this. Consider: {string} Factors = {"a","b","c"}; tuple T_2 { key int i; int ...
over 1 year ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Future consideration

OPL Lazy Constraint Pool

At http://www-01.ibm.com/support/docview.wss?uid=swg21681643, it is indicated that it is not possible to add lazy constraints in OPL Script. I know OPL is not a programming language, but it is quite important to be able to add lazy constraints in ...
over 3 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Future consideration

Add TDNoOverlap constraint type to CP Optimizer

The TDNoOverlap constraint type is presented in chapter 7 of the Ph.D. thesis "A Constraint Programming Approach for the Time Dependent Traveling Salesman Problem", by Penelope Aguiar-Melgarejo https://hal.archives-ouvertes.fr/hal-01514369/documen...
over 2 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Future consideration

Human-readable status response

In the new multiobjective optimization support in CPLEX (Java API, but likely true in other APIs), querying status via IloCplex.getMultiObjInfo(IloCplex.MultiObjIntInfo.MultiObjStatus, ...) returns a numeric code (e.g. 107). This is difficult to i...
almost 2 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Future consideration

Add doopl in the CPLEX distribution on Watson Studio

relying on docplex python API got much easier since docplex was included in the CPLEX product. doopl which is a python package that allows to call OPL model from python code can be download from https://pypi.org/project/doopl/ but having doopl in ...
almost 2 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Planned for future release

CPO interactive enhancement to write or query solution

CPO interactive misses some very useful command to simply query one solution value for a given variable with its name (allowing wildcards to display more variables) Today, the only way we can query a solution is through display solution command th...
about 2 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Future consideration