problem.nextIIS
Purpose
Continues the search for further Irreducible Infeasible Sets (IIS), or calls
problem.firstIIS if no IIS has been identified yet.
Topic areas
Infeasibility, Optimizer
Synopsis
status = problem.nextIIS()
Return value
|
status
|
The status after the search:
|
Further information
1. Returning multiple IISs is supported only for linear problems.
2. A model may have several infeasibilities. Repairing a single IIS may not make the model feasible. For this reason the Optimizer attempts to find an IIS for each of the infeasibilities in a model. You may call the problem.nextIIS function repeatedly, or use the
problem.IISAll function to retrieve all IIS at once.
3. This function is not affected by the control
MAXIIS.
4. If the problem has been modified since the last call to
problem.firstIIS or
problem.nextIIS, the generation process has to be started from scratch.
Related topics
problem.getIISData,
problem.IISAll,
problem.clearIIS,
problem.firstIIS,
problem.IISIsolations,
problem.printIIS,
problem.IISStatus,
problem.writeIIS
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