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XPRBgetnumiis

Purpose
Get the number of independent IIS in an infeasible LP problem.
Synopsis
int XPRBgetnumiis(XPRBprob prob);
Argument
prob 
Reference to a problem.
Return value
Number of independent IIS found by Xpress Optimizer, or a negative value in case of error.
Example
The following gets the number of IIS for a problem. 
XPRBprob expl2;
int num;
expl2 = XPRBnewprob("example2");
   ...
XPRBlpoptimize(expl2, "");
if(XPRBgetlpstat(expl2)==XPRB_LP_INFEAS)
 num = XPRBgetnumiis(expl2);
Further information
This function returns the number of independent IIS (irreducible infeasible sets) of an infeasible LP or MIP problem. After retrieving the number of IIS, the variables and constraints in each set can be obtained with function XPRBgetiis.
Related topics
XPRBgetiis, XPRBgetlpstat.

Parent Topic BCL C library functions

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