APAR status
Closed as program error.
Error description
IloNumVarArray::setBounds() doesn't work correctly if the num vars initial bound are different from 0..IloInfinity Consider the example below that leads to all vars in IloNumVarArray end-up with same bound. Issue is that when num var array is created with common bounds that is different from 0..Infinity then shared domains are created but setBounds routine doesn't clone the shared domain before changing the values. int main() { const int n = 5; IloEnv env; try{ IloNumVarArray x(env, n, -IloInfinity, IloInfinity, IloNumVar::Float); //doesn't work //IloNumVarArray x(env, n, 0, IloInfinity); //<--- works //IloNumVarArray x(env, n, 0, 0); //doesn't work IloNumArray lb(env); IloNumArray ub(env); for(int i=0; i<n; i++) { lb.add(-i); ub.add(i); cout<<"Setting lb[]="<<lb[i]<<"; ub[]="<<ub[i]<<endl; //x[i].setLB(-i);x[i].setUB(i);//workaround 1 //x[i].setBounds(-i,i);//workaround 2 } x.setBounds(lb, ub); cout<<"Retrieved bound values"<<endl; for(int i=0; i<n; i++) { cout<<"x["<<i<<"]: LB="<<x[i].getLB()<<"; UB="<<x[i].getUB()<<endl; } } catch (IloException& e) { cerr << "Concert exception caught: " << e << endl; } catch (...) { cerr << "Unknown exception caught" << endl; } env.end(); }
Local fix
Please refer to the sample in the APAR description. The workarounds involve setting the bounds individually for every variable in the IloNumVarArray. This can either be done using the setLB() and setUB() methods or the setBounds() method for the individual variables. The workarounds have been commented in the sample.
Problem summary
setBounds() routine on IloNumVarArray modifies bounds incorrectly if initial bounds are not 0..IloInfinity
Problem conclusion
This issue has been resolved and fix is in CPLEX Optimization Studio v12.3
Temporary fix
Comments
APAR Information
APAR number
RS00643
Reported component name
CPLEX OPTI STUD
Reported component ID
5725A0600
Reported release
C20
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-04-28
Closed date
2011-07-29
Last modified date
2011-07-29
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
CPLEX OPTI STUD
Fixed component ID
5725A0600
Applicable component levels
RC20 PSN
UP
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Document Information
Modified date:
29 July 2011