To monitor nested search, type the following:

IlcSolverDebugger debugger(solver,IloTrue,IloFalse,1.0,4005,0,IloTrue); 
ILCGOAL2(MyIlcGoal,IlcIntVarArray, a, IlcSolverDebugger, debugger) { 
   debugger.beginNestedSearchTreeView(); 
   a.getManager().solve(IlcGenerate(a)); 
   debugger.endNestedSearchTreeView(); 
   return 0; 
} 
ILOCPGOALWRAPPER2(MyIloGoal, solver, IloIntVarArray, a, 
                  IlcSolverDebugger, debugger) { 
   return MyIlcGoal(solver.getManager(),solver.getIntVarArray(a),debugger); 
}