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Status Future consideration
Created by Guest
Created on Oct 23, 2020

"If and only if" for indicator-constraints in MATLAB API

We use the CPLEX for MATLAB API to solve a MILP. In our case the bottleneck of the API is the limited functionality of indicator constraints. Whereas in OPL and the Java API an "if and only if" statement is possible, this functionality is missing in MATLAB.

Java and OPL offers both options:
z = 0 -> x == 0 (in case x != 0 => z=0 or z=1)
z = 0 x == 0 (in case x != 0 => z=1)
MATLAB only one direction:
z = 0 -> x == 0 (in case x != 0 => z=0 or z=1)

It would be helpful to have the operator also available in the MATLAB API.

When I try to import such a model through the MATLAB API, I get the error 'CPLEX encountered unsupported indicator constraints in a model file'