Infeasibility Finder

Type

Selection

Range

The settings listed below

Default

Off

If this option is switched ‘On’ and a model is infeasible, extra information will be written to the listing file. Possible values are:

  • On

  • Off

Note

  • By default AIMMS will suppress the writing of the irreducible infeasibility set (IIS) for encrypted AIMMS projects; see the option Suppress Listing File Encrypted Project.

  • The following solvers have an infeasibility finder: CPLEX, Gurobi, COPT, CONOPT and BARON.

  • The infeasibility finder can also be used for infeasible MIP models using CPLEX, Gurobi or COPT, or nonlinear models using Gurobi.

  • CPLEX will use its conflict refiner if this option is switched on to construct an irreducible infeasibility set (IIS).

  • XA’s infeasibility finder will only be used if this option is switched on and the XA option Force is set to ‘Yes’.

  • CONOPT’s infeasibility finder only finds infeasibilities in recursive and triangular equations.

  • BARON’s infeasibility finder will only be used if this option is switched on and the BARON option Compute IIS is set to a non-default value.

  • An alternative for locating infeasibilities in your model is available via the violation penalty attribute of the mathematical program.

Learn more about