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Decision Optimization CPLEX & For Watson Studio

Showing 99

OPL csv import/export

Generating .dat is not that elegant.Importing/exporting from Excel is slow.Csv format is often used for other applications as well.
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Delivered

read solution from cpo file

For CP-Optimizer, it would be great to have the ability to read a given solution from a file and pass it to a cpo model as a starting point and also enable to check this solution feasibility
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

Piecewise function with input as coordinate (x,y) of curve's points

the actual piecewise function in OPL takes as input abscissas and vector coefficient to construct the function.Many time people have user have the (x;y) coordinate. to do that you need to write OPL code to find the vector coefficient.Would be grea...
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

In CPLEX studio; display DOcplexCloud solve as local solve

In the IDE (CPLEX studio), with a solve on DOcplexCloud is not display the same way as a local solve.That create lots of extra work to explore the input data, the constraint expressed and the result.
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Not under consideration

Function to Add tuple to a set in OPL not only in OPLscript

Have an OPL fucntion to add tuple to a set.It will avoid to use OPL script to populate them whish is slow and increase complexity of modeling.A work around that I use it to create identical Set of tuple in OPL and use OPLscript to just copy them i...
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

If conditions in pre-processing in .mod files

To maintain two (or more) similar models in one instead of in two (or more) separate .mod files, we need the possibility of using if conditions in pre-processing in .mod files without using execution blocks.
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

Cplex.solveFixed() for OPL Script

Is there an equivalent of Cplex.SolveFixed() for OPL Script ?I'm looking for dual costs of a MILP.So I'd like to1) solve it to get the solution.2) solve the corresponding LP with fixed integer variables3) get dual costsI don't know in advance the ...
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Not under consideration

Information callback procedure for Benders algorithm

For MIP problems using branch-and-bound the CPLEX API offers the info or MIP callback procedure which can be used to retrieve information during a MIP search. For the Benders algorithm these callback procedures do not work (CPLEX 12.7 throws an er...
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Planned for future release

Have a regenerate option in OPL flow control

Have a way to call regenerate a model when you change some data in scripting without the need to build from zero the model out of the model and the data.
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration

Resolve race condition in CP optimizer engine

We've run into what seems to be a race condition in the cp optimizer engine with multiple workers. The issue occurs when a worker finds the initial solution right around the time limit. In this case, the engine believes that it timed out, but it a...
12 months ago in Decision Optimization CPLEX & For Watson Studio 0 Future consideration