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CPLEX Optimization Studio

Showing 23

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 3 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 a[F...
12 months ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 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...
almost 2 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Future consideration

Postpone the end of support for IBM DOCPLEX Cloud

It is currently planned an end of support for IBM Optimization center in september 2020. Given the global crisis related to COVID 19 Pandemia, our development team are understaffed and there is a risk not to be ready by September 2020. Could we ex...

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 ...
about 1 year ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Planned for future release

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 2 years ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Future consideration

Dynamic stopping criterion - An effective way to interrupt the optimal solution search for MILP

Please, see the attached document-

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...
over 1 year ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 Future consideration

Consistent handling for exportModel(), writeMIPStarts() , etc

The handling where methods like e.g. exportModel() and writeMIPStarts() is not consistent and not intuitive.In case no absolute path is specifies, exportModel() always writes the file parallel to the mod-file. Whereas writeMIPStarts(), while sta...
over 1 year ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 1 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...
about 1 year ago in Decision Optimization CPLEX & For Watson Studio / CPLEX Optimization Studio 0 Future consideration