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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...
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...
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.
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 ...
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...
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...
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